Hi @akalopi,
Thanks for getting back to us with this issue and for sending more information. Hopefully, we can avoid any further sadness or frustration with this.
To help us troubleshoot, can you provide the following information:
1. Can you confirm that all your other plugins and themes are up-to-date? If you’ve updated everything recently, can you make sure that you’ve cleared the cache from any page caching plugins and any server cache?
2.?Check for conflicts by deactivating all non-Yoast plugins and switching to a default WordPress theme like Twenty Nineteen. Does the error still appear?
3. If you can give us the steps to reproduce the problem, we’ll be able to test it. For example, where did these errors appear? Just on the page edit screen? When viewing a page? Was Schema plugin, the block editor, or Elementor active?