Sbiba (mp_desertv):
You have to play a weapon class on this map.
Disable "all weapons", "modern weapons", weapons on back and command monitor model changer. Then enable one of the weapon classes:
set ex_all_weapons_mp_desertv "0"
set ex_modern_weapons_mp_desertv "0"
set ex_wepo_class_mp_desertv "4"
set ex_cmdmonitor_models_mp_desertv "0"
set ex_weaponsonback_mp_desertv "0"
Worked for me.