If you are interacting with sidechains or custom networks, we highly recommend you read our user guide here.
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. See our article on adding networks to find out how to do this.
- 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.