If you encounter a problem with Plexus Connect, you can report it to us on our [Support Portal on Freshdesk](https://chemaxon.freshdesk.com/support/home).1. Obtaining the Plexus Connect log files
In order to solve a problem with Plexus Connect, we might request additional information which can be found in the Plexus Connect log files. These log files can be found in the **logs** folder of the directory where Plexus Connect has been started. When you report a problem to us, please, send us all the ***.log** files in this folder in order to make troubleshooting faster. (The***.zip** files might be requested as well in some more complicated cases.)
You can find the following log files: ***plexus_backend.log*** , ***plexus_frontend.log*** and ***plexus_connection_pool.log***.1. Troubleshooting authentication issues
If a schema cannot be initialized due to authentication issues with credentials in IJS file(s), or a particular Plexus Connect user is not able to successfully log in with supposedly correct credentials, try to turn on detailed logging by uncommenting two logger... lines in Logback configuration file. For further details see here.
// Security - uncomment two lines below to troubleshoot problems with authentication
//logger("org.springframework.security", TRACE)
//logger("com.im.ijc.serverfacade.impl.SFAuthenticationServiceImpl", TRACE)