V0.3.0 i2c tether firmware doesn't load on CodeBug

[veryalien]

When I try to load the codebug_i2c_tether_v0.3.0.cbg file onto CodeBug, the middle LED lights as well as the right hand LED. I assume this indicates some sort of error, as other cbg firmware files don't light the middle LED when loading them into CodeBug.
Loading the original codebug_i2c_tether.cbg file from github works fine and I can connect from my raspberry and light LEDs using the set_pixel commands as expected.
Can you please fix the V0.3:0 firmware file so it can be loaded....

[syberphunk]

Experienced the same problem. 0.3.0 is broken and the codebug is uncommunicative on i2c, had to revert to the older firmware.

[immenz]

Is there a documentation on how to build the i2c tether firmware?