Are file tools 3.0 and ELGG 3.1.1 compatible?

I am trying to use file tools 3.0 with ELGG 3.1.1. files and categories installed and activated beforehand. file tools 3.0 installs and activates. Clicking the file tools settings opens the window, but gives the following Fatal Error:

An unrecoverable error has occurred and has been logged. Contact the site administrator with the following information:

Exception at time 2019-08-31T17:26:25+00:00.

Any ideas?