If you can access the CLI using your password, you should also be able to log into the WebUI with the same password without any issues.
Could you please clarify whether you receive an “Incorrect password” message or if no message appears at all?
Please try the following steps:
Clear your browser cache and try again.
Use incognito mode to access the WebUI.
If possible, perform a factory reset on the device. This will restore the default settings, and you can log in using the default password displayed on the router’s back panel.