Guacamole - Debug

Debug Guacamole 
 During PMAD, Guacamole does not connect instantly 
 Done: 
 journalctl -u tomcat9 -f 
 Test a connection. Check for the following line: 
 [http-nio-8081-exec-9] WARN o.a.g.r.auth.AuthenticationService - Authentication attempt from [10.48.2
50.43, 127.0.0.1] for user "root" failed. 
 If it is present: 
 systemctl restart tomcat9
journalctl -u tomcat9 -f 
 Check for the following line: 
 ERROR o.a.g.extension.ExtensionModule - Extension "guacamole-auth-jdbc-mysql-1.5.4.jar" could not be loaded: Unable to read contents of directory /etc/guacamole/lib 
 If present: 
 chmod 755 /etc/guacamole/lib/