It seems that the Mendix server files are corrupt. Can you add Mendix 4.0.1 again on the Management tab?
I see that you added the VM argument '-cp path'. Can you remove this argument? The -cp option is already used to add all the necessary libraries, and the libraries of the userlib folder of your application are included automatically.
There's also a new version of the Mendix Windows Service. You can download them from the support portal.