When you go as a SWAT and spawn in a police/SWAT Tahoe the material is missing and it is just purple and black squares.
Yup it's been happening forever. Although for other people the skin looks alright at times.
It's strange really
If you actually try it in single player, you get the same problem. I think it was just an update to the liveries that messed it up.
It does for everyone , just waiit little and will fix automatic
Its been here like ages now ^^
Theres nothing we can really do about it besides contact the creator of the addon for support, as we didn't make the addon and it's out of our hands.