Just wanted to say when I updated my game, I ran into this issue again. I had tried just running Origin as Administrator.
Clearing the Origin Cache files did the trick, though! 🙌
Two things that need to be noted, though: you must kill the OriginWebHelperService process in Task Manager (in Windows 10; don't know about Mac, but crinrict's page about clearing the cache links to a page dedicated to that) to delete the ServiceLogs, and you have to redo your Application Settings afterwards, including the location of your Origin Games folder and disabling automatic game updates.
