Someone else have a problem to mining with Bitcoin core wallet address?
Authentication is failing.
A Bitcoin address is a Bitcoin address, the wallet you use doesn't change anything. A mining pool software can't tell the difference between a bech32 address generated with Electrum and a bech32 address from Core, for example, because they aren't any difference.
Does your Bitcoin Core offer you a legacy address, perhaps? What's your address prefix? Even if that's the case, I don't think this should be an issue, as far as I know public-pool accepts all kind of BTC addresses (perhaps not Silent but it's offtopic).