Ok, the obvious reason is that an add-on is breaking something. Here are a couple of solutions.
- Post console log. Maybe we can find the add-on from that.
- Run with only default add-ons, then enable them up in groups of 5 to narrow it down.
- Search through your add-ons list and find unneeded client or server mods. It could also be an erroneous weapon pack.
Those are the solutions that I can think of at the moment. Hope at least one of them works.
