The error code 2124-5210 means that the Switch or the game is failing to communicate with its online servers. The following factors can be considered as the main for the error code 2124-5210:
Restart the Switch and Router
A temporary communication glitch between the Switch and its servers may cause the error message. Here, restarting the Switch and router may solve the problem. But before that, make sure the Nintendo servers are up and running. If the issue persists and is occurring with Pokemon, check if doing the global room from the basement of a Pokemon Center clears the error 2124-5210.
Readd the Wi-Fi Connection to the Nintendo Switch
A temporary glitch in the communication modules of Nintendo’s Switch may result in the error code 2124-5210. In such a case, re-adding the Wi-Fi connection (after removing it) of the Nintendo Switch may solve the problem.
Change DNS of the Nintendo Switch
You may encounter the error code if the DNS of the network is failing to translate the Nintendo servers’ addresses due to which the connection between the Switch and its servers may fail. In this context, changing the Switch’s DNS may clear the error.
Reset the Nintendo Switch to the Factory Defaults
You may encounter the issue if the firmware of the Nintendo Switch is corrupt as the modules may fail to perform their required tasks. In this context, resetting the Switch to its factory defaults may clear the error under discussion. We strongly iterate to check if the Nintendo services are up and running. If there is no Nintendo service outage, then you may proceed with the reset option after backing up the Switch’s data.
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