On my zombie plague 5.0.5 server, humans can't see hud with HP, human class and ammo packs while zombies can.This is the error log:
L 07/13/2021 - 22:09:45: [AMXX] Displaying debug trace (plugin "zp50_hud_info.amxx", version "5.0.5")
L 07/13/2021 - 22:09:45: [AMXX] Run time error 14: native not found (native "zp_class_survivor_get")
L 07/13/2021 - 22:09:45: [AMXX] [0] zp50_hud_info.sma::ShowHUD (line 135)