On startup it will contact the specified license server(s) to get all the available licenses. (to only show those options in the selection dialog)
So maybe xPCB has problems to contact the server?
You could test this by disabling the available license check on startup by setting the MGC_DISABLE_PRESPLASH_CHECKS environment variable to 1.
Thank you, Matthias, for swift responce.
What should this variable do with that value?
If set to 1 It will not check which licenses are available and just show all possible license options in the license selection dialog.
Can enable it to test if the problem is with the license server. (It will then only contact the licence server after selecting the license options)