The eth_protocolVersion API call is gone as it made no sense

[mooonly]

I got this error

warn Ethereum node failed to respond to protocol version request JsonRpcError: the method eth_protocolVersion does not exist/is not available

https://blog.ethereum.org/2021/03/03/geth-v1-10-0

This method has been deprecated in geth v1.10

[tmartin14]

Are you seeing an error or just a warning. The return for this call was changed a while back to warn rather than error or fail. See the change here.

[mooonly]

thk