Vehicles not spawning is a result of handling ID's in vehicles.meta file not matching any handling files in the handling.meta. If they're changed, all cars will spawn
To make the pickups spawn, go into the vehicles.meta file and find in each pickup meta the following lines:
<animConvRoofDictName>va_23legacy1500</animConvRoofDictName>
<animConvRoofName>23legacy1500</animConvRoofName>
Replace whatever is in between the brackets with "null" so it looks like this:
<animConvRoofDictName>null</animConvRoofDictName>
<animConvRoofName>null</animConvRoofName>
All the pickups will now spawn
To make the pickups spawn, go into the vehicles.meta file and find in each pickup meta the following lines:
<animConvRoofDictName>va_23legacy1500</animConvRoofDictName>
<animConvRoofName>23legacy1500</animConvRoofName>
Replace whatever is in between the brackets with "null" so it looks like this:
<animConvRoofDictName>null</animConvRoofDictName>
<animConvRoofName>null</animConvRoofName>
All the pickups will now spawn