The model was created in "GameGuru Character Creator", there is a script "ai_soldier.lua". I do not know what the problem is.

It would be my guess that the character has not been given a valid weapon, so would not be able to use the script assigned. Specifying this line in your characters FPE file might help: "hasweapon = modern\colt1911"

Unfortunately it did not help, for some reason the latest version of the program does not have firearms by default, there are files in the .bmp and .fpe formats, but there is no .x file, and there is no "modern" folder. Below is a list of files in the folder "weapons".

c:\Program Files (x86)\Steam\steamapps\common\Game Guru\File
-------------------------------------------------------------
.38 Cartridges (Pistol).fpe
.38 Cartridges (Pistol).bmp
.45 Rounds (Magnum).fpe
.45 Rounds (Magnum).bmp
7.62mm NATO (Rifle).bmp
7.62mm NATO (Rifle).fpe
9mm Parabellum (Uzi).bmp
9mm Parabellum (Uzi).fpe
12 Gauge Slug (Shotgun).bmp
12 Gauge Slug (Shotgun).fpe
Arrows.X
Bow.fpe
Bow.bmp
Bow.X
Bow_arrows.fpe
Bow_arrows.bmp
Bow_D2.dds
colt 1911.fpe
colt 1911.bmp
Crossbow.bmp
Crossbow.fpe
Crossbow.X
Crossbow_arrows.fpe
Crossbow_arrows.bmp
Crossbow_D2.dds
Dagger.fpe
Dagger.X
Dagger.bmp
Dagger_D2.dds
Flail.bmp
Flail.fpe
Flail.X
Flail_D2.dds
Grenades.fpe
Grenades.bmp
Halberd.X
Halberd.bmp
Halberd.fpe
Halberd_D2.dds
Hatchet.X
Hatchet.bmp
Hatchet.fpe
Hatchet_D2.dds
Mace.X
Mace.bmp
Mace.fpe
Mace_D2.dds
Magnum 357.bmp
Magnum 357.fpe
pmine.X
pmine_D.dds
pmine_I.dds
pmine_N.dds
pmine_S.dds
Proximity Mine.bmp
Proximity Mine.fpe
RPG.fpe
RPG.bmp
RPG Rounds (Explosive).bmp
RPG Rounds (Explosive).fpe
Shotgun.bmp
Shotgun.fpe
Slingshot.fpe
Slingshot.X
Slingshot.bmp
Slingshot_D2.dds
Slingshot_stones.fpe
Slingshot_stones.bmp
Sniper M700.fpe
Sniper M700.bmp
Stones.X
Stones_thrown.bmp
Stones_thrown.fpe
Sword.fpe
Sword.bmp
Sword.X
Sword_D2.dds
Uzi.bmp
Uzi.fpe

Weapons in the weapons folder are only the physical ones that are placed on the maps, they're not the weapons used by players or non player characters.

The modern folder used for players and characters is located in:

c:\Program Files (x86)\Steam\steamapps\common\Game Guru\File\gamecore\guns

If your characters aren't using weapons, and you can't choose to use them it sounds like your gameguru has somehow switched to restricted mode, which disables certain things for parental controls.

Go to the menu at the top and select Help > Toggle Restricted Content and use the code 9119 to unlock it

Belidos, thank you very much, it all worked. I thought that in GG a restricted mode password is set at the first start, but it's necessary to unlock it on the contrary.

Yeah there seems to be a bug where sometimes with an update restricted mode gets turned on, but the user doesn't know, that's why the master code was added.