The only reasons that the mod does not work can be:
An invalid DLC list listing. The new update may have updated the new dlclist that does not include the dlc for the add-on cars.
Invalid script problems. Maybe you need to update your script stuff(ScripthookV, nativeui, etc) This only applies if you have a mod like Realism Dispatch Enhanced. Mods like RDE use scripts to spawn the cars in traffic. Without a working script, the mod will not work.
Invalid gameconfig. If you have addon cars, chances are, you crash if the gameconfig does not support the addon cars.
Invalid traffic files. I forgot the name of the traffic files but the cars will not spawn in traffic if the files that make the car to spawn does not work, you will not see the cars in traffic.
The car may spawn. You may have just failed to type in the correct name in a trainer or the Ragehook command counsel. I.E: "Spawn staniler is not the same as "Spawn Stalilnen" or "Spwan Stainer".
Good luck fixing your issue.
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