I also have this problem.
I tried following @DeletedUser98's instructions as well as the other two posts on the issue (1,2), but I could not solve the problem.
In my case I have two .gif files of 0 bytes each, detectable only from the "Downloads" folder from the stock File Manager ("Files").
I will wait for the problem to resolve itself. However, if anyone has a solution I would be more than happy to try it.