maybe it would help to do a batterie recalibration. just let the op1 turned on until the batterie is fully empty and it shuts down by itself. then turn it off and plug it into a wall until the leds stop to blink.
Based on the error message it looks to be an error regarding the tape in some way - were files loaded into the OP-1 before this happened? - personally I’ve locked mine up via over modulating certain parameters, but the factory reset brought it back every time.
Today happened the same problem with my OP1, I tried to reset it and also upload the firmware but nothing changed.
Did you find a way to solve the issue?
Please let me know
Yuri