When creating a MAS file using the MAS2 program, Creating a mod with an underscore in the name e.g. "Formula_1_2018" will create a mod file called "Formula_1_2018_10.mas" ( _10 for version 1.0 is appended onto the file after creation ). When using this file to host a dedicated server, clients fail to connect on LAN ( not checked on WAN ). If the mod file just uses spaces e.g. "Formula 1 2018", the file Formula 1 2018_10.mas works perfectly fine. Older versions spaces would do this, and underscores had to be used. I've posted this as a Bug Report too, Unless this is intended use?