Symptoms
Unable to activate a scheduled Task in Domains > Scheduled Tasks - after refresh it is still shown as disabled
Cause
This is expected behavior when the main domain of the subscription is suspended - when it is suspended the following command is run automatically to stop the execution of crontab commands of a specific user account:
# plesk sbin crontabmng deny USERNAME
This command adds the value ##!PSA!## into the crontab user file preventing a scheduled task from execution so the files starts to look like the following:
# grep PSA /var/spool/cron/USERNAME
##!PSA!## 0 2 * * * (((((/opt/plesk/php/7.4/bin/php -f 'example.com/bin/console' -- 'cache:clear') ) ) ) ) > /dev/null
Resolution
Use one of the following solutions:
Solution 1 - Reactivate the subscription
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Log into Plesk
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Go to Subscriptions or Domains > Select subscriptions to change > click on Change Status:
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Go to Subscriptions or Domains > example.com and click on Activate or Suspend in the Hosting menu on right side bar.