Whenever I try to rebuild the barriers or shot♥♥♥♥♥♥♥grenade zombies this error pops up:

server script error
pair '0' and 'undefined' has unmatching types 'int' and 'undefined'
scripts/zm/_zm_bgb.gsc:0

I don't know what it means or if its a bug with the map or some settings I have on the server. Also I don't know if it'd effect it but I do have "/developer 2" instead of "/developer 0" because I wanted to mess around on the map with cheats and weapons and such.

(P.S. there is a minor bug with the zombies that sometimes they will spawn and just sit inside of the actual window space and not leave/chase the player. Also there are times where powerups will drop inside the window space as well.)

However, great map and really simple. I like it, but I wish there were more perks/ability to buy more than 4 in total. JUST SAYING :)