Error in log (Only enterprise zones can purge by tag)

pgp111 you found a bug in the documentation! The solution is to disable: purge_queuer_coretags! I'll keep this issue open with the goal of updating the docs.

Does not fix disabling purge_queuer_coretags

root@dev /var/www/htdocs # drush pmu purge_queuer_coretags -y
purge_queuer_coretags is already uninstalled.                                                                                                                                                            [ok]
There were no extensions that could be uninstalled.

Keep getting errors:

purger_cloudflare_230de137ce: Client error: `DELETE https://api.cloudflare.com/client/v4/zones/d4cb97b6fdd0ee15f4f86f2cbff3f100/purge_cache` resulted in a `400 Bad Request` response: @"success":false,"errors":[{"code":1107,"message":"Only enterprise zones can purge by tag."],"messages":[],"result":nul (truncated...)

Also the docu for 8.x is outdated, the - clear stale tag clear requests: `drush ev "delete from queue where name = 'purge'"` does not work and ends up in error, as I understand it's set for D7 version or something:

ParseError: syntax error, unexpected 'from' (T_STRING) in drush_core_php_eval() (line 1 of phar:///usr/local/bin/drush/commands/core/core.drush.inc(1165) : eval()'d code) #0                            [error]
phar:///usr/local/bin/drush/includes/command.inc(422): drush_core_php_eval('delete from que...')
#1 phar:///usr/local/bin/drush/includes/command.inc(231): _drush_invoke_hooks(Array, Array)
#2 phar:///usr/local/bin/drush/includes/command.inc(199): drush_command('delete from que...')
#3 phar:///usr/local/bin/drush/lib/Drush/Boot/BaseBoot.php(67): drush_dispatch(Array)
#4 phar:///usr/local/bin/drush/includes/preflight.inc(66): Drush\Boot\BaseBoot->bootstrap_and_dispatch()
#5 phar:///usr/local/bin/drush/includes/startup.inc(458): drush_main()
#6 phar:///usr/local/bin/drush/includes/startup.inc(365): drush_run_main(false, '/', 'Phar detected. ...')
#7 phar:///usr/local/bin/drush/drush(114): drush_startup(Array)
#8 /usr/local/bin/drush(10): require('phar:///usr/loc...')
#9 {main}.
ParseError: syntax error, unexpected 'from' (T_STRING) in phar:///usr/local/bin/drush/commands/core/core.drush.inc(1165) : eval()'d code on line 1 #0 phar:///usr/local/bin/drush/includes/command.inc(422): drush_core_php_eval('delete from que...')
#1 phar:///usr/local/bin/drush/includes/command.inc(231): _drush_invoke_hooks(Array, Array)
#2 phar:///usr/local/bin/drush/includes/command.inc(199): drush_command('delete from que...')
#3 phar:///usr/local/bin/drush/lib/Drush/Boot/BaseBoot.php(67): drush_dispatch(Array)
#4 phar:///usr/local/bin/drush/includes/preflight.inc(66): Drush\Boot\BaseBoot->bootstrap_and_dispatch()
#5 phar:///usr/local/bin/drush/includes/startup.inc(458): drush_main()
#6 phar:///usr/local/bin/drush/includes/startup.inc(365): drush_run_main(false, '/', 'Phar detected. ...')
#7 phar:///usr/local/bin/drush/drush(114): drush_startup(Array)
#8 /usr/local/bin/drush(10): require('phar:///usr/loc...')
#9 {main}
ParseError: syntax error, unexpected 'from' (T_STRING) in drush_core_php_eval() (line 1 of phar:///usr/local/bin/drush/commands/core/core.drush.inc(1165) : eval()'d code).
Drush command terminated abnormally due to an unrecoverable error.             

Try doing drush pqe. That will empty the queue. It should work after that. I'll update the documentation accordingly.

I have no idea what's purge pqe and how to do it.

apologies I meant to write drush pqe

I confirm that disabling purge_queuer_coretags and enabling purge_queuer_url , then running drush pqe solves the problem (free tier).
I submitted a pull request to fix the documentation: https://github.com/d8-contrib-modules/cloudflare/pull/61

This can be worked around by using the patch from #3165072: Split purgers by type and enabling only the "Cloudflare URL" purger.