Remove Drush from hostmaster site install - preflight failure. Cannot verify old platforms or install new ones after upgrade to 7.x-3.144

The command could not be executed successfully (returned: Drush preflight prepare loaded autoloader at [preflight] /var/aegir/hostmaster-7.x-3.144/sites/insitehost.socialnicheguru.com/vendor/autoload.php [0.01 sec, 2.4 MB] Starting Drush preflight. [0.01 sec, 2.4 MB] [preflight] Loading drushrc "/var/aegir/.drush/drushrc.php" into "home.drush" scope. [0.01 sec, [bootstrap] 2.66 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_logs/drush [0.01 sec, 2.68 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_site_backup_manager/drush [0.01 sec, 2.68 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_tasks_extra/hosting_sync/drush [0.01 sec, 2.68 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_tasks_extra/http_basic_auth/drush [0.01 sec, 2.68 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_tasks_extra/drush [0.01 sec, 2.68 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_remote_import/drush [0.01 sec, 2.68 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_dns/drush [0.01 sec, 2.68 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_https/submodules/apache_https/drush [0.01 sec, 2.68 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_https/submodules/certificate/drush [0.01 sec, 2.68 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_https/submodules/letsencrypt/drush [0.01 sec, 2.69 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_https/submodules/self_signed/drush [0.01 sec, 2.69 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_https/drush [0.01 sec, 2.69 MB] Cache HIT cid: 8.1.16-commandfiles-0-4ac7b26efac410b0badbe31412f2efbd [0.01 sec, [debug] 2.73 MB] Loading drushrc [bootstrap] "/var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/all/drush/drushrc.php" into "drupal" scope. [0.04 sec, 5.68 MB] Scanning into /etc/drush for /.*aliases\.drush(8|)rc\.php$/ [0.09 sec, 9.8 MB] [debug] Scanning into /etc/drush for /self\.alias\.drush(8|)rc\.php$/ [0.09 sec, 9.8 MB] [debug] Scanning into [debug] /var/aegir/hostmaster-7.x-3.144/sites/insitehost.socialnicheguru.com/vendor/drush/drush/includes/.. for /.*aliases\.drush(8|)rc\.php$/ [0.09 sec, 9.8 MB] Scanning into [debug] /var/aegir/hostmaster-7.x-3.144/sites/insitehost.socialnicheguru.com/vendor/drush/drush/includes/.. for /self\.alias\.drush(8|)rc\.php$/ [0.09 sec, 9.81 MB] Scanning into /var/aegir/.drush for /.*aliases\.drush(8|)rc\.php$/ [0.1 sec, 9.81 [debug] MB] Scanning into /var/aegir/.drush for /self\.alias\.drush(8|)rc\.php$/ [0.1 sec, 9.81 [debug] MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/../drush for /.*aliases\.drush(8|)rc\.php$/ [0.11 sec, 9.81 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/../drush for /self\.alias\.drush(8|)rc\.php$/ [0.11 sec, 9.81 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/drush for /.*aliases\.drush(8|)rc\.php$/ [0.11 sec, 9.81 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/drush for /self\.alias\.drush(8|)rc\.php$/ [0.11 sec, 9.81 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/all/drush for /.*aliases\.drush(8|)rc\.php$/ [0.11 sec, 9.81 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/all/drush for /self\.alias\.drush(8|)rc\.php$/ [0.11 sec, 9.81 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/default for /.*aliases\.drush(8|)rc\.php$/ [0.11 sec, 9.81 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/default for /self\.alias\.drush(8|)rc\.php$/ [0.11 sec, 9.81 MB] Loaded alias @self from file /var/aegir/.drush/self.alias.drushrc.php [0.11 sec, [notice] 9.81 MB] Begin redispatch via drush_invoke_process(). [0.11 sec, 9.82 MB] [notice] Backend invoke: env COLUMNS=95 [command] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/vendor/drush/drush/drush.launcher --root=/var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html --uri= --verbose --debug @self provision-save '@platform_IDEVdevsocial8x111drupal845' --context_type=platform --master_url=http://insitehost.socialnicheguru.com/ --server='@server_master' --web_server='@server_master' --make_working_copy=null 2>&1 [0.11 sec, 9.83 MB] Calling proc_open(env COLUMNS=95 /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/vendor/drush/drush/drush.launcher --root=/var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html --uri= --verbose --debug @self provision-save '@platform_IDEVdevsocial8x111drupal845' --context_type=platform --master_url=http://insitehost.socialnicheguru.com/ --server='@server_master' --web_server='@server_master' --make_working_copy=null 2>&1); Drush preflight prepare loaded autoloader at [preflight] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/vendor/autoload.php [0.01 sec, 3.73 MB] Starting Drush preflight. [0.01 sec, 3.73 MB] [preflight] Loading drushrc "/var/aegir/.drush/drushrc.php" into "home.drush" scope. [0.01 sec, [bootstrap] 4 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_logs/drush [0.01 sec, 4.01 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_site_backup_manager/drush [0.01 sec, 4.01 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_tasks_extra/hosting_sync/drush [0.01 sec, 4.02 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_tasks_extra/http_basic_auth/drush [0.01 sec, 4.02 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_tasks_extra/drush [0.01 sec, 4.02 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_remote_import/drush [0.01 sec, 4.02 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_dns/drush [0.01 sec, 4.02 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_https/submodules/apache_https/drush [0.01 sec, 4.02 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_https/submodules/certificate/drush [0.01 sec, 4.02 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_https/submodules/letsencrypt/drush [0.01 sec, 4.02 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_https/submodules/self_signed/drush [0.01 sec, 4.02 MB] Include [notice] /var/aegir/hostmaster-7.x-3.144/profiles/hostmaster/modules/aegir/hosting_https/drush [0.01 sec, 4.02 MB] Cache HIT cid: 8.1.16-commandfiles-0-f7df035132a10c1de057ed0e261c3145 [0.01 sec, [debug] 4.06 MB] Scanning into /etc/drush for /.*aliases\.drush(8|)rc\.php$/ [0.04 sec, 7.02 MB] [debug] Scanning into /etc/drush for /self\.alias\.drush(8|)rc\.php$/ [0.04 sec, 7.02 MB] [debug] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/vendor/drush/drush/includes/.. for /.*aliases\.drush(8|)rc\.php$/ [0.04 sec, 7.03 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/vendor/drush/drush/includes/.. for /self\.alias\.drush(8|)rc\.php$/ [0.04 sec, 7.03 MB] Scanning into /var/aegir/.drush for /.*aliases\.drush(8|)rc\.php$/ [0.05 sec, 7.03 [debug] MB] Scanning into /var/aegir/.drush for /self\.alias\.drush(8|)rc\.php$/ [0.05 sec, 7.03 [debug] MB] Loaded alias @self from file /var/aegir/.drush/self.alias.drushrc.php [0.12 sec, [notice] 9.34 MB] Loading drushrc [bootstrap] "/var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/all/drush/drushrc.php" into "drupal" scope. [0.12 sec, 9.34 MB] Loading drushrc [bootstrap] "/var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/all/drush/drushrc.php" into "drupal" scope. [0.13 sec, 11.15 MB] Bootstrap to phase 0. [0.14 sec, 11.15 MB] [bootstrap] Bootstrap to phase 0. [0.14 sec, 11.16 MB] [bootstrap] Found command: provision-save (commandfile=provision) [0.14 sec, 11.16 MB] [bootstrap] Scanning into /etc/drush for /.*aliases\.drush(8|)rc\.php$/ [0.14 sec, 11.17 MB] [debug] Scanning into /etc/drush for /server_master\.alias\.drush(8|)rc\.php$/ [0.14 sec, [debug] 11.17 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/vendor/drush/drush/includes/.. for /.*aliases\.drush(8|)rc\.php$/ [0.14 sec, 11.17 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/vendor/drush/drush/includes/.. for /server_master\.alias\.drush(8|)rc\.php$/ [0.14 sec, 11.17 MB] Scanning into /var/aegir/.drush for /.*aliases\.drush(8|)rc\.php$/ [0.14 sec, 11.17 [debug] MB] Scanning into /var/aegir/.drush for /server_master\.alias\.drush(8|)rc\.php$/ [0.15 [debug] sec, 11.17 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/../drush for /.*aliases\.drush(8|)rc\.php$/ [0.16 sec, 11.17 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/../drush for /server_master\.alias\.drush(8|)rc\.php$/ [0.16 sec, 11.17 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/drush for /.*aliases\.drush(8|)rc\.php$/ [0.16 sec, 11.17 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/drush for /server_master\.alias\.drush(8|)rc\.php$/ [0.16 sec, 11.18 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/all/drush for /.*aliases\.drush(8|)rc\.php$/ [0.16 sec, 11.18 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/all/drush for /server_master\.alias\.drush(8|)rc\.php$/ [0.16 sec, 11.18 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/default for /.*aliases\.drush(8|)rc\.php$/ [0.16 sec, 11.18 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/default for /server_master\.alias\.drush(8|)rc\.php$/ [0.16 sec, 11.18 MB] Loaded alias @server_master from file [notice] /var/aegir/.drush/server_master.alias.drushrc.php [0.16 sec, 11.18 MB] Loading LetsEncrypt driver for the Certificate service [0.16 sec, 11.21 MB] [notice] Loading dnsmasq driver for the dns service [0.16 sec, 11.22 MB] [notice] Loading https_apache driver for the http service [0.16 sec, 11.26 MB] [notice] Executing: ln -sf '/var/aegir/config/server_master/dnsmasq.conf' '/var/aegir/config/dnsmasq.conf' Created symlink for dnsmasq.conf on insitehost.socialnicheguru.com [0.17 sec, 11.26 [notice] MB] Calling hook drush_provision_save [0.17 sec, 11.55 MB] [debug] Scanning into /etc/drush for /.*aliases\.drush(8|)rc\.php$/ [0.17 sec, 11.56 MB] [debug] Scanning into /etc/drush for [debug] /platform_IDEVdevsocial8x111drupal845\.alias\.drush(8|)rc\.php$/ [0.17 sec, 11.56 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/vendor/drush/drush/includes/.. for /.*aliases\.drush(8|)rc\.php$/ [0.17 sec, 11.56 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/vendor/drush/drush/includes/.. for /platform_IDEVdevsocial8x111drupal845\.alias\.drush(8|)rc\.php$/ [0.17 sec, 11.56 MB] Scanning into /var/aegir/.drush for /.*aliases\.drush(8|)rc\.php$/ [0.17 sec, 11.56 [debug] MB] Scanning into /var/aegir/.drush for [debug] /platform_IDEVdevsocial8x111drupal845\.alias\.drush(8|)rc\.php$/ [0.18 sec, 11.56 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/../drush for /.*aliases\.drush(8|)rc\.php$/ [0.18 sec, 11.56 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/../drush for /platform_IDEVdevsocial8x111drupal845\.alias\.drush(8|)rc\.php$/ [0.18 sec, 11.56 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/drush for /.*aliases\.drush(8|)rc\.php$/ [0.18 sec, 11.57 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/drush for /platform_IDEVdevsocial8x111drupal845\.alias\.drush(8|)rc\.php$/ [0.18 sec, 11.57 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/all/drush for /.*aliases\.drush(8|)rc\.php$/ [0.18 sec, 11.57 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/all/drush for /platform_IDEVdevsocial8x111drupal845\.alias\.drush(8|)rc\.php$/ [0.18 sec, 11.57 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/default for /.*aliases\.drush(8|)rc\.php$/ [0.18 sec, 11.57 MB] Scanning into [debug] /var/aegir/platforms/drupal/8/servers/1-dev/sng-contrib/dev-social-8.x-1.11-drupal-8.4.5/html/sites/default for /platform_IDEVdevsocial8x111drupal845\.alias\.drush(8|)rc\.php$/ [0.18 sec, 11.57 MB] Loaded alias @platform_IDEVdevsocial8x111drupal845 from file [notice] /var/aegir/.drush/platform_IDEVdevsocial8x111drupal845.alias.drushrc.php [0.18 sec, 11.57 MB] Undefined index: aliases Alias.php:22 [0.19 sec, 11.6 MB] [notice] Undefined index: drush_aliases Alias.php:25 [0.19 sec, 11.6 MB] [notice] Template loaded from Provision Config class Provision_Config_Drushrc_Alias: [notice] /usr/share/drush/commands/provision/Provision/Config/Drushrc/provision_drushrc_alias.tpl.php [0.19 sec, 11.66 MB] Changed permissions of [1;32;40m[1m[success][0m /var/aegir/.drush/platform_IDEVdevsocial8x111drupal845.alias.drushrc.php to 640 [0.19 sec, 11.66 MB] Generated config in write(): Drush configuration file [1;32;40m[1m[success][0m (/var/aegir/.drush/platform_IDEVdevsocial8x111drupal845.alias.drushrc.php) [0.19 sec, 11.66 MB] Changed permissions of [1;32;40m[1m[success][0m /var/aegir/.drush/platform_IDEVdevsocial8x111drupal845.alias.drushrc.php to 440 [0.19 sec, 11.66 MB] Returned from hook drush_provision_save [0.19 sec, 11.66 MB] [debug] Command dispatch complete [0.19 sec, 11.57 MB] [notice] End redispatch via drush_invoke_process(). [0.37 sec, 9.82 MB] [notice] , code: 0)

ok. I think I solved it.

sudo -u aegir -sH
cd /var/aegir/hostmaster-7.x-3.144
composer require drush/drush 8.x
cd sites/myaegir.com
composer require drush/drush 8.x

run the verify and the autoload would fail. From above:
/var/aegir/hostmaster-7.x-3.144/sites/insitehost.socialnicheguru.com/vendor/autoload.php

so I removed drush from the hostmaster directory and all seems to work
cd /var/aegir/hostmaster-7.x-3.144
rm composer.json composer.lock
rm -rf vendor

rerun platform verify and it seems to work.