I'm able to run new Android Studio projects perfectly, but I am trying to build an older project and keep receiving the error "Unknown android attribute 'MenuView'" during the :appcompat:generateDebugRFile task. I have tried using different gradle versions, different build tools versions, and changing the api level. I even tried the solutions for this similar post with no luck. The error definitely hints at an issue with the appcompat library, but android-support-v7 should be fine and I've found most instructions for updating the appcompat library to be outdated.
I'm really frustrated with this error (especially since I've been able to build the project recently in the past). Any help would be greatly appreciated