Updated today - got the WSOD after update. Refreshed.

Anywhere Matukio was as a module failed. Message: Error while rendering position. Trying to go to the component in the back end gives me the error message in the second screenshot.

I disabled Matukio plugins and component and all back to normal without Matukio.

The issue appears to be the Upcoming Events module. Disabled then enabled one by one. Upcoming Events module causes crash (see 4th screen shot.)

And I can't search the forums here - template shows in a split screen without the ability to search. No dropdown or search field. See 3rd screenshot.

Regards,
Mark