DEVMODigispark Kickstarter Attiny85 USB Development Board Compatible with ar-duino

This unit which is supposed to be a Digispark clone but does not communicate with the Arduino IDE. I have the Digispark hardware support files loaded in Arduino 1.8.13 with micronucleus updated to the latest version (I'm on linux) and the new udev rules file added. When uploading a sketch, the IDE recognizes the board when I plug it in and appears to be uploading but at the end I get "Flash write error: Protocol error has occured ...". This happens on every USB port and on multiple computers. I also tried it with ATtinyCore which supports micronucleus but got the same result. All my other Arduino (Uno, Nano, XAIO, etc.) micros communicate with no issues.