You're unable to connect to an online service and you receive the error code 2124-4007 or 2124-4508.
You receive the error message "The use of online services on this console is currently restricted by Nintendo."
What to do:
This error code indicates that the Nintendo Switch console you are using has been permanently banned from connecting to the internet due to a breach of the user agreements.
A breach of user agreements may include, but is not limited to, activities such as:
Fraudulent or unauthorized transactions
Violation of the Code of Conduct