308 - ANS4503E Valid password not available for server ...?

Access to a node requires entering a correct password, which is used to log in to the ISP server.
This error occurs if an incorrect password is entered or if the local file containing the encrypted password is lost.

FAQ entry 115 explains how to reset the password yourself.

After resetting it, one can test the connection to the server using a test command. Example:

dsmc query mgmt