FX Loop Not Working Post 3.1.0

After the 3.1.0 update, the FX send and/or return have stopped functioning. The result is nothing goes into my amp and nothing goes into the cabinet. I have ruled out the amp as being bad. Everything worked fine for years prior to this update. Is anyone else having issues?
Any suggestions?

CorOS Version: 3.1.0

Describe your issue:
See above
Steps to reproduce your issue:
1 Install 3.1.0
2. That’s it, no sound coming out of cabinet. Unplug FX send/return, there is sound

I expected this to happen:
See above

I have tried the following things:
-Reboot, power unplug