I've used this add-on for a long while with various population mods, but I've been trying to make one of my own and have been running into the same crash a lot. It also applies to other population mods, too. The error message is as follows:

"511/ - infected: UTIL_SetModel: not precached: models/infected/common_male_trackjacket.mdl"

I've already tried verifying my game's files, putting "+precache_all_survivors 1" in my launch options and after starting a map, uninstalling my campaigns, and making sure my add-ons are up to date. I even reinstalled the game! Is there anything else I can do short of downloading that Sourcemod plug-in?