In the Goldshell Zone under account settings, the miner password and the password on the miner dashboard must be consistent to connect successfully. If you change the password on the miner dashboard, you need to enter the new password in Goldshell Zone >> account settings >> miner password.
If you have verified that the passwords are consistent but continue to encounter a login failure message, it is advisable to consider other factors, such as network connectivity, that may be contributing to the issue.