I'm going to keep it short and sweet because frankly I haven't got a clue what's up with it. The log is saying there's some errors with PeterUCallouts trying to find Traffic Policer, or it's out of date or whatever. Traffic Policer is up to date and I've not changed anything since the last time I played, apart from removing vehicle mods and ELS because there were too many controls to try and edit to get it to work in unison with the rest.
I haven't noticed the game crash for anything else, only when I hit the right thumbstick to initiate a traffic stop. I've noticed the NPC's vehicle decides to park in stupid areas everytime and it takes a few attempts to get them to pull over realistically, even with plenty of space. After exiting the vehicle, as I approach and before I hit E (StopThePed) the game just crashes. I've attached my log for someone to look at if they don't mind helping me out.
https://pastebin.com/S2EHKP7Z
I'm not sure what else there is to say but I can help out with other information if need be.
Edit: I've remembered I uninstalled Traffic Policer because I no longer used it, just using StopThePed and Interaction+ instead. PeterUCallouts seems to depend on it but I've completed some of his callouts just yesterday with no issue, namely the 'Security needs assistance' and 'Suspicious ATM activity'. Traffic Policer was actually removed a few weeks ago and the issue has only just started to happen.