Unable to save new connection details

[robi]

New SSH connection can't be saved. (tried others too)

Save button gives the Error dialog: Permission Denied.

Logs show:

Oct 13 14:11:12 WARNING: An illegal reflective access operation has occurred
Oct 13 14:11:12 WARNING: Illegal reflective access by org.apache.ibatis.ognl.OgnlRuntime (file:/app/code/guacamole-client-home/extensions/guacamole-auth-jdbc-mysql-1.3.0.jar) to method java.util.Collections$EmptySet.isEmpty()
Oct 13 14:11:12 WARNING: Please consider reporting this to the maintainers of org.apache.ibatis.ognl.OgnlRuntime
Oct 13 14:11:12 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
Oct 13 14:11:12 WARNING: All illegal access operations will be denied in a future release
Oct 13 14:12:21 21:12:21.776 [http-nio-8080-exec-2] INFO o.a.g.environment.LocalEnvironment - GUACAMOLE_HOME is "/app/code/guacamole-client-home".

[robi]

@robi The universe gave me a hint this could be due to a session timeout, will re-test.