Hi boina; welcome to the forum 
I’ve got something similar (scroll to the bottom of that post for a list of affected files). For me the error message is EXTRA_FILE, not INVALID_HASH.
I’ll try downloading them from the repo, if they’re available.
Given that it says EXTRA_FILE, I wonder if I can simply delete them (…or move them to /tmp, which seems less “final”). Or will that break the mail app, I wonder…?
N.B. I use Ubuntu not Arch. And I either upgrade manually or using the updater built in to Nextcloud: I don’t use the OS package manager for that.