looks like the first error is with sp4s's callouts. best guess is to re-install that callouts mod from lcpdfr or gta4mods.com and try again. let me know if it happens again.
Lol, search up how to disable hotkeys for simple native trainer gta iv and you should be good to go,it helped me because I force duty and to bring up the commands is ~ that also spawns a taxi with hotkeys lol