If you are encountering a specific error code during execution, feel free to share the or the current firmware version of your system so we can narrow down the precise technical issue. MotoGP™21 on Steam
If you are using a Switch with custom firmware (CFW) like , follow these steps: motogp21nspupdateromslabrar install
It was the readme.txt from the romslab.rar archive. It contained only one sentence: If you are encountering a specific error code