I installed CiviCRM 5.23.4 on Wordpress 5.4 and the
Support menu is not visible. How do I enable and use the API explorer?
If I go to
/wp-admin/admin.php?page=CiviCRM&q=civicrm/ajax/doc/api#explorer I have an empty page (only the title is visible).
Try clearing your CiviCRM cache CiviCRM >> Administer >> System Settings >> Cleanup Caches and Update Paths.
Check if the Support menu is enabled in CiviCRM >> Administer >> Customize Data and Screens >> Navigation Menu
The api3 explorer link is