I have the same problem as well failed with with status code 500. I have not gotten an answer yet either I heard it could have something to do with catalyst rewards. I have not see any rewards from fund 5 yet and they could be there but not showing up so the amount is different on what the blockchain shows and what the wallet is showing and that’s why it does not let us withdraw our rewards because they are not matching. I heard some people say it should correct itself. But if anyone knows forsure please let us know.
Problem solved…i changed the staking pool…that is all:)