So i have spent around 200 hours modelling in blender, all of a sudden when I try to build the package with the models I have created I get the errors attached as a picture here in the console. I have another file which is from the early stages of my project, this loads fine into MSFS, its this specific blender file that doesnt. I think it has something to do with the objects, as appending everything into a new blender file does not solve the issue. There are no modifiers applied, and building the package worked fine about 30 hours of work earlier. I am desperate for help, if I dont get this fixed it would put countless hours of labor to waste. I dont even know where to start trying to fix this, and other than the general mesh of the main building I dont have a file that works.