MetaMask: Internal JSON-RPC error (Transaction Error) - Quick fix

If you get the error "Internal JSON-RPC error" while trying to interact with other networks, try the following:
Ensure the network has been added correctly.
Ensure you have enough native tokens from that network to pay for gas.
Ensure you are using the latest version of the app or the extension.
Try changing the rpc usually solves the issue. Go to settings, then networks and open Arbitrum. There you just change the rpc
Als try.