In order to minimize the loss of user's profit, Poolin will verify address format when you set / modify the wallet address. Only the address that passes the verification can enter the next verification code.
Some users may use the address of Bitcoincash: qq ..... when they set BSV address. After setting, they will receive an error message similar to the invalid address. BSV completed a hard fork upgrade on July 24, 2019. After the upgrade, Bitcoinincash: qq ... addresses or similar format addresses will no longer be supported.
In order to ensure that you can receive BSV mining profits normally, please change the wallet / exchange to use a BSV address of another format.