First UD is no longer installed on my site.
I scanned with WF first and noted there was an upgrade for WF and Contact Form 7 so I installed these first.
Next I did instal UD and ran WF scan and got at the end of the scan:
[Feb 04 22:39:17] Scan process ended after forking.
I uninstalled UD and the scan ran normal.
Hope this helps. Let me know how I can support best.