From the properties page in Identity Governance, verify if the password matches the one you have in your connector server.
1. Check the Password present under the field : jcs.ui.password
2. If does not match, update connector server password and restart JCS.
3. If you don't remember the password, reset the password.
If the connector server and IG are on different servers.
The default property value for jcs.ui.url will be http://localhost:20080/jcs_osgi_ui/.
Replace the localhost with the Connector Server IP.