Maintenance keykard not working on entrance

[Itsuiki]

I got the keycard for the door in the cave, but the scanner just blinks red when i try to use the keycard on it.

[Humpenstilzchen]

Are you sure you have the correct card? There are three of them. A maintenence card, a guest card and a vip card.

[Itsuiki]

Pretty sure, the internet said the bunker where the katana/golden armor is needs the maintenance keycard

[Andy Mil]

I saw my guy using purple card opening bunker. I dont which but i pretty sure yellow is maintenace

[untiltable mountain]

set a tent,save and restart the game

[Itsuiki]

I did actually figure it out, even tho everything online said to use the maintenance key, it only let me in after i cleared the other 2 bunkers and got the other 2 keycards. Idk if you're supposed to do that bunker last cause of the cutscene or what. Either way i just beat the game last night.

[Chris]

Originally posted by Ju-On:

I got the keycard for the door in the cave, but the scanner just blinks red when i try to use the keycard on it.

Along that the title says "Maintenance keykard not working on entrance" but in neither the title nor the text you mentioned which cave or door at all. So with that said: If the pad was blinking red you simply did not have the correct key card while the one you needed you acquired in one of the other caves you mentioned in the post above this one.