Bug : the players slots are invisible in lobby ?

[ArcheRp]

Hello everyone!

I'm here looking for a bit of help because I'm confused... I just finished creating a 6-player map based on mission 8 of the Undead campaign in Reign of Chaos. I added quite a few custom models, but nothing extravagant.

I saved my map in the map format, working in folder mode. However, when I try to open it in the lobby, there are no player slots! None at all.

Screenshot below :

Does anyone know why I can't see any slots? I tested it, and it seems that if I remove all the custom models, my map becomes openable again. Is there something I'm doing wrong? Are there limitations on the number of models?

Thanks in advance for your help !