Answers.Body: <p>we have similar issue but after clearing civicrm cache using menu/rebuild it started working.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-06-18T22:53:35.140Z
Answers.Text: For drupal civicrm/menu/rebuild?reset=1
Answers.UserDisplayName: Luke Stewart
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2018-04-12T05:29:33.807Z
Answers.LastActivityDate: 2018-04-12T05:29:33.807Z
Answers.UserDisplayName: Sunil Pawar
Answers.Body: <p>We were seeing the same problem after upgrade to CiviCRM 5.0.2.  This is a detail follow-up on Sunil's answer above (<em>sorry, didn't have enough reputation points to comment on his directly and thought this would be useful.</em>)...</p>
  
  <p>The URL to clear the CiviCRM Cache is:</p>
  
  <p><a href="http://example.org/wp-admin/admin.php?page=CiviCRM&amp;q=civicrm/menu/rebuild&amp;reset=1" rel="nofollow noreferrer">http://example.org/wp-admin/admin.php?page=CiviCRM&amp;q=civicrm/menu/rebuild&amp;reset=1</a></p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2018-04-26T20:12:00.407Z
Answers.LastActivityDate: 2018-04-26T20:12:00.407Z
Answers.UserDisplayName: ChaosBuster
Answers.Body: <p>Still figuring this out - but disabling Event Calendar (com.osseed.eventcalendar) fixed the issue.</p>
  
  <p>Update: Cleaned up Cache - error persisted, Cleaned up cache and rebuilt CiviCRM menu - re-enabled com.oosseed.eventcalendar - all good to go. </p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2018-04-12T04:19:23.173Z
Answers.LastActivityDate: 2018-04-12T15:56:57.977Z
Answers.LastEditDate: 2018-04-12T15:56:57.977Z
Answers.UserDisplayName: themak
Answers.Body: <p>I had this problem after upgrading from Drupal 8 to 9 and upgrading Civi to 5.51.1. Thanks to @seamuslee on <a href="https://chat.civicrm.org/civicrm/pl/wkf38q1a7jn4ifrwiaxeebfetw" rel="noreferrer">Mattermost</a> for solving this issue for me. These are the steps I followed on a Drupal installation to fix it:</p>
  <ol>
  <li>Disable Mosaico in Extensions</li>
  <li>Disable Flexmailer in Extensions</li>
  <li>Delete the Flexmailer extension directory (<code>/sites/default/files/civicrm/ext/org.civicrm.flexmailer</code>)</li>
  <li>Clear Civi caches and rebuild paths/menus at <code>/civicrm/admin/setting/updateConfigBackend?reset=1</code></li>
  <li>Enable Flexmailer in Extensions</li>
  <li>Enable Mosaico in Extensions</li>
  </ol>
  <p>This issue is also answered at <a href="https://civicrm.stackexchange.com/questions/39134/civicrm-core-now-includes-flexmailer-how-to-remove-old-flexmailer-extension">CiviCRM core now includes Flexmailer: how to remove old flexmailer extension?</a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-09-15T16:10:38.327Z
Answers.Text: that rocks! thanks Ben and Seamus
Answers.UserDisplayName: Guillaume Sorel
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-08-04T14:10:55.773Z
Answers.LastActivityDate: 2022-08-04T14:10:55.773Z
Answers.UserDisplayName: Ben
Body: <p>Everytime I try to make an event, or access any page with event information, I get the following error:</p>
  
  <p><code>You have requested a non-existent service "civi_flexmailer_required_tokens".</code></p>
  
  <p>Using latest Civi 5, Wordpress 4.9</p>
  
Tags: <civievent><civimail>
Title: Event Error - civi_flexmailer_required_tokens
ThreadText: # Event Error - civi_flexmailer_required_tokens
  
  (Asked by: username_0 on 2018-04-11)
  
  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
  
  **Tags:** civievent, civimail
  
  
  ---
  
  ## 4 answers
  
  ### Answer by username_4 on 2022-08-04. Score: 5 | Accepted answer
  
  I had this problem after upgrading from Drupal 8 to 9 and upgrading Civi to 5.51.1. Thanks to @seamuslee on [Mattermost](https://chat.civicrm.org/civicrm/pl/wkf38q1a7jn4ifrwiaxeebfetw) for solving this issue for me. These are the steps I followed on a Drupal installation to fix it:
  
  1. Disable Mosaico in Extensions
  2. Disable Flexmailer in Extensions
  3. Delete the Flexmailer extension directory (`/sites/default/files/civicrm/ext/org.civicrm.flexmailer`)
  4. Clear Civi caches and rebuild paths/menus at `/civicrm/admin/setting/updateConfigBackend?reset=1`
  5. Enable Flexmailer in Extensions
  6. Enable Mosaico in Extensions
  
  This issue is also answered at [CiviCRM core now includes Flexmailer: how to remove old flexmailer extension?](https://civicrm.stackexchange.com/questions/39134/civicrm-core-now-includes-flexmailer-how-to-remove-old-flexmailer-extension)
  
  > **Comments:**
  > **username_5**: that rocks! thanks Ben and Seamus  
  
  ---
  
  ### Answer by username_1 on 2018-04-12. Score: 6
  
  we have similar issue but after clearing civicrm cache using menu/rebuild it started working.
  
  > **Comments:**
  > **username_2**: For drupal civicrm/menu/rebuild?reset=1  
  
  ---
  
  ### Answer by username_3 on 2018-04-26. Score: 2
  
  We were seeing the same problem after upgrade to CiviCRM 5.0.2. This is a detail follow-up on username_1'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:
  
  <http://example.org/wp-admin/admin.php?page=CiviCRM&q=civicrm/menu/rebuild&reset=1>
  
  
  ---
  
  ### Answer by username_0 on 2018-04-12. Score: 0
  
  Still figuring this out - but disabling Event Calendar (com.osseed.eventcalendar) fixed the issue.
  
  Update: Cleaned up Cache - error persisted, Cleaned up cache and rebuilt CiviCRM menu - re-enabled com.oosseed.eventcalendar - all good to go.
  
  
  ---
  
  