that error was found in multiplayer, forgot to specify

This can happen if you have either both Jmod and Jmod legacy active, or Jmod and ULX active on the same time. You can stop this from spamming by typing "jmod_reloadconfig" (without quotes) into the dev console (in single player) or into server console (in dedicated server multiplayer)

im doing peer-to-peer friends-only multiplayer, not dedicated server

ill just try dev console and see if it works

also i cant respawn for some reason probably not caused by this mod

I get this error as well, I have legs 3 and my model looks very odd looking down at it and my c_hands for the weapon models seemed to disappear and disabling JMod fixed it so the error in JMod is the cause of this for some reason, though I am not sure why it is breaking my playermodel and c_hands because I never had this issue with using JMod

i did jmod_reloadconfig in console and it fixed the error spamming

I was actually about to do that but for some reason resubscribing to JMod fixed it, that was a very weird bug