Window shows "remove color cartidge

2 possible problems.
1 cartridge faulty or just needs a wipe
2 carriage ribbon damaged
Take the cartridge out and gently rub the gold contacts on the side with a piece of tisue. This might clear it. Take a look at the cartridge carriage in the printer and make sure the ribbon where all the gold contacts meet up with the contacts on the cartridge is not damaged in any way. sometimes the little metal spring which holds the cartridge pierces the ribbon at the back of the carriage and then the printer is unserviceable.
if rubbing the cartridge does not work and the ribbon is not damaged then assume you have a faulty cartridge - rare but it does happen