" - Bad Data in Module: Source: Debrecen carte - bouton VASSAL.png Error: Image not found. Turn on the Audit Trail preference to generate more details in the errorlog."
I don’t understant the problem and how to resolve, can someone help me please ?
Likely the developer intended to include a image that is either been removed from the module somehow or is there under a different name. It maybe that it causes no real issue for using the module.
You could try contacting whoever maintains the module - login to the module page and hopefully you will find a contact link.