This would likely require editing the game files - which is not something a trainer can do. All trainers can do is inject code into memory addresses in your PC’s RAM to change numerical values in a game.
Sometimes, the error message in the ship builder is necessary to prevent you from corrupting your save file. For example, building a ship with no cargo bay or landing gear because you forgot to add it might make it impossible to exit or land your ship (I’m guessing, never tried it).
Are you referring to the Star Wars Genesis mod for Starfield?
That is something you will have to test for yourself. We do not test trainers with third-party mods. There are far too many mods out there, testing them all with Wand would be humanly impossible, and they are never guaranteed to be updated to the latest version.