The update last week included a small compatibility update where if WordFence Falcon cache was being used, it would clear the page cached when an entry is added/updated. This is done so the change will be immediately displayed rather than having to wait for the page cache to expire and be refresh. I’ll be releasing an update tomorrow which will contain a fix for the code supplied from their documentation. I think I may have misinterpreted it slightly. To fix it now, you can follow the directions given to another user the other day.
Apologies for the trouble! Hope this helps.