Retriever

For quite a while my UI looked like that, it didn't crash my game but it was rather annoying. Turns out renaming the GameData folder to something like 'Lazor System 29' broke some file paths or something, reinstalled it leaving the naming alone and it fixed it. Hope this helps.

I have also been having this problem, it seems to occur when i switch from a craft with a working Lazor System in a different SOI to Kerbin (Minmus) to do other things, i then switch back and the Lazor system is non-functional. Loading an autosave from when it was working doesn't fix it, i can only launch the craft again but that too stops working once i leave it orbiting Minmus and switch away.