Does this error happens just with this modeller?
Hello Yogendra,
Sometimes there is something wrong with the password that’s stored in an encrypted way in your Modeler settings file. Can you try to locate file `C:\Users\<username>\AppData\Local\Mendix\Settings.sqlite` and rename it to `Settings.sqlite.old`. That resets your settings and allows you to reenter the password.
I hope this helps,
Paul