What does the error "Unable to apply action from rule..." in the event log mean?
The error lists that a specific business rule was unable to perform an action on a ticket, even though that rule met the conditions for it to fire. In the example below you will see that there is a rule ID (79346026) that is referenced along with a specific action that was unable to be performed. The rule ID is a unique number assigned to a specific trigger or automation.
To locate what business rule failed to apply the action you can navigate to Admin icon () > Business Rules > Triggers or Automations. Each rule ID is referenced in the URL, so to find the specific rule in question, you will want to select each trigger or automation until you find the matching number in the URL.
Once you have located the business rule in question, you can then inspect the actions of the trigger or automation to investigate why that action was unable to be applied to the ticket.
This example trigger is currently set to change the ticket Priority to Low. However, the account settings only allow for tickets to be set to Normal or High which is why the trigger was unable to perform the action.