Issues with PolkadotJS login and externally-owned account

[ntn-x2]

I am using Parity Signer for most of my accounts, but unfortunately I cannot use it to log into any Polkassembly space because apparently the challenge generation does not follow the structure that the signer expects. For more details, please refer to the Parity Signer issue novasamatech/parity-signer#997.