Hey @nivos89
Thanks for getting back to me.
Are you able to navigate to the event via the URL?
Can you try a few of the troubleshooting steps below and let me know if you’re able to narrow down the issue, please?
1. A first quick test is to simply temporarily revert to a default WordPress theme such as twenty-nineteen to see if the issue persists.
If the issue persists, please try running a quick conflict test on your site. This test will reveal if any other element of your site, the theme, or one of the plugins, is causing conflicts. You can follow the steps mentioned in the link below and share the results with me, https://theeventscalendar.com/knowledgebase/k/testing-for-conflicts/.
2. Can you reset your permalinks, please? (likely not the issue, just want to rule it out) https://theeventscalendar.com/knowledgebase/k/fixing-http-404-errors/