Upgrade wizard says there is a bad permissions on a nonexistant file

The first step the system is reporting a bad permissions in the AOD folder. I checked for the file and it isn’t there. Now what do I do. I am at version 7.8.2
Thanks

It’s fixed in 7.8.3, see

https://github.com/salesagility/SuiteCRM/issues/3212

Anyway my advice is just to keep retrying until it works. You only get that error with some bad luck (Indexer creates a file during system check, and deletes it during the same check).