Everytime I try to make an event, or access any page with event information, I get the following error:
You have requested a non-existent service "civi_flexmailer_required_tokens".
Using latest Civi 5, Wordpress 4.9
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I had this problem after upgrading from Drupal 8 to 9 and upgrading Civi to 5.51.1. Thanks to @seamuslee on Mattermost for solving this issue for me. These are the steps I followed on a Drupal installation to fix it:
This issue is also answered at CiviCRM core now includes Flexmailer: how to remove old flexmailer extension?
We were seeing the same problem after upgrade to CiviCRM 5.0.2. This is a detail follow-up on Sunil's answer above (sorry, didn't have enough reputation points to comment on his directly and thought this would be useful.)...
The URL to clear the CiviCRM Cache is: