The File Name must represent the Family Name. The latter includes a Mono particle, while the prior doesn't. Deleting that particle from the Family Name could solve this since none of the other "mono" Bitcount families include it.
However, please note that there is another reported need to differentiate the "standard" from the colored fonts, see #18
🔥 FAIL: Checking file is named canonically. (com.google.fonts/check/canonical_filename)
Reported for:
The File Name must represent the Family Name. The latter includes a
Monoparticle, while the prior doesn't. Deleting that particle from the Family Name could solve this since none of the other "mono" Bitcount families include it.However, please note that there is another reported need to differentiate the "standard" from the colored fonts, see #18