MyTVOnline2 Recording error

I started getting Recording in MyTVOnline2 app Error 2 days ago. I attached a 256GB Sandisk USB stick. It shows up fine in Setup. When I try to record the channel I am watching, I get the Recording Error. See attached 3 screenshots. It was working fine until something got updated - I forgot what was updated - I think it was MyTVOnline2. Hope someone will give me guidance on how this can be fixed.

I tried both a USB stick and a portable hard drive. Same error in both cases. I did format the stick and the drive in GTV.

Thanks Sam. Followed your instructions. No change. Still getting the same error. I installed Tivimate and it is able to record to the same USB stick with no issues. I tested by scheduling 5 programs and all were recorded perfectly. Issue seems to be between GTV and MOL2.