Your server (specifically realism mod) tried to adjust the weighting of the `.300 Blackout BCP FMJ` cartridge and failed
Undo any manual changes you've made,
Make sure realism is updated, if it is, check its the support page and see if anyone else has experienced the same issue
I've tried fully removing Realism mod and installing the last uploaded one
and it still has the same error and ai not spawning...
anyways i removed it completely and now everything works
Thanks for pinpointing the mod that was causing the issue.