Troubleshooting "Did not find valid content inside" errors

I’m running Cryptomator 1.5.8 and noticed I have 2 folders that have the dreaded “Did not find valid content inside” in the log file. I did manage to find one of them by accident when I tried to create a folder I thought was missing and even though it isn’t shown it won’t let me create with the same name.

As my vault version is 7, I can’t run Sanitizer. Is my only option to wait for 1.6.0 to be released which will have integrity checking built-in? It is frustrating as I can’t tell what files are corrupt - it was by chance I found the error when I tried to create a folder I thought was missing.

Any ideas, appreciated!