INVALID Security Certificate followed by FAILED to MOVE

HI All

initially, the client is presented with " uses an invalid security certificate."

I advised them to continue.

The next issue is that when they move a file from one library to another the file looks to moved but fails with:

"Failed to move "filename.pdf"

Are these issues related?

Whether they are are not, would someone please push in the correct direction as to how to fix?

I appreciate any time you might spend on this

Craig R.
Brisbane, Australia