I'm having the same issue: viewtopic.php?t=80055

Antenna, channels ATSC 1.0 (below 100)

I'm frequently getting the following error with the HDHomeRun App on Roku:
The App loads, I can get to the guide, but when selecting a channel:
"Roku Player Error (an unexpeted problem) but not server timeout or HTTP error"

Also, not as frequent, this pop's up on startup:
EXIT_BRIGHTSCRIPT ...