IC-705 FT8 issue?

After working faultlessly for several days on 6m FT8, I am getting an error message when I try to TX on 10m FT8 with the IC-705.  

I checked the COM ports and audio selection (all fine). I re-installed WSJT-X v2.6 (same issue). The next thing is to re-install sound cards on the IC-705 and try again.