Until this is fixed there is a workaround I use that works. You’re standing too close. You need to stand back from the shelter kit and slowly inch towards it from the left or right corner until the option to build the shelter pops up.

In T169984#2401465, @Krlito wrote:

I'M so happy you gonna do something for that cause it's almost unplayable People abuse with alternative accounts everywhere in the bunker it's fighting against an army... alternative accounts Just killed the game and the permadeath thing those People don't play dayz anymore...