Ctools & Admin Menu Errors on update [#2751557]

Fatal error: require_once(): Failed opening required '/xxx/sites/all/modules/ctools/page_manager/plugins/tasks/page.admin.inc' (include_path='.:/opt/alt/php55/usr/share/pear:/opt/alt/php55/usr/share/php') in xxx/sites/all/modules/ctools/includes/plugins.inc on line 796

We are now getting this error on all three of our Drupal sites. This occurs when we try to run update.php . The issue is fixed ONLY when we use phpmyadmin to clear all cache, sometimes it takes twice but then we can get it to complete.

Thanks for any help you can suggest

Comments

Comment #1

18 June 2016 at 21:02

venusrising created an issue. See original summary.

Comment #2

venusrising CreditAttribution: venusrising commented 18 June 2016 at 22:14

When I turn off the ctools page manager module I can update without issue.

Comment #3

taugusto CreditAttribution: taugusto commented 20 June 2016 at 10:18

I report the same occurrence on my installation
First

Fatal error: require_once() [function.require]: Failed opening required '//sites/all/modules/ctools/page_manager/plugins/tasks/page.admin.inc' (include_path='.:/:/usr/local/php/pear5') in /sites/all/modules/ctools/includes/plugins.inc on line 477

after truncate table cache

Might I have your assitance with this please... , unfortunately production site was struck by this error after
XML Sitemap - Moderately Critical - XSS - SA-CONTRIB-2016-030 module update.

I am not really agile with the drupal so step-by-step for safety kindly required.
p.s. manual page manager module turn off helps but the languages mainpages /en /pl etc. pages don't appear back. The rest of pages work.