Spacebuild 3 Addon?

I have Spacebuild 3, and LS3 and RD3 and CAF, all SVN.
When I start a single player game in the spacebuild 3 gamemode, I get constant messages telling me to install the Spacebuild Addon.
I also can’t place any climate regulators other that air exchangers.
What am I missing?

Did you put spacebuild game mode in addons or game modes?

slayer it goes in addons even tho it looks like a gamemode

Thanks guys, got it working.