Help it wont let me build some of my ships

Ok so I have a few ships I just flat out cant build been playing the campaign for a few missions now and I cant build attack bombers. Heavy corvettes, or the drone frigates. I thought maybe the level restricted them being built but it’s been a few levels now and nothing has changed. Yes I have them researched, and yes they are unlocked. I just flat out cant que them to build. I click on the tab for them and its like nobody is home.

Just restart the game or Alt-Tab. Its a known issue where the mouse doesn’t register on the menu.