Hi @llka
Thanks for your message.
Could you try editing the event that has the issue and change the date/time, click update button, and check if that makes a difference?
If that doesn’t help, would it be possible for you to set up a staging version of your live site and try to re-do the migration from it? This is to recreate the proper event data and should fix the 404 issues.
Here are the steps to revert and re-do the migration:
- Update to the latest versions of The Events Calendar.
- Remove any un-needed draft events and empty the Trash.
- Install and activate the Code Snippets plugin.
- Add this snippet and run it once (be sure it does not stay activated).
- Go to Events > Settings > Upgrades and go through the migration process again.
Please re-do the migration on your staging site.
Could you also provide the version of the following? This will help me understand how your system is set up.
- PHP
- WordPress
- The Events Calendar
- Theme