First the error, I can’t see it all but I assume it is referring to a texture, based on your question. In blender, in the msfs material properties, triple check all your textures do not end in 001, 002 etc. it will look like image.png.001. That file doesn’t exist, the 001 is being exported. Backspace those out or reassign from mini Dropdown-Menü list. That little number can make a model invisible.
Right before you select export, make sure all objects are selected the ctrlA and scale. I also use the parameters and set location and origin as well. The immediately export. She textures are wrong in game 99% it’s you model uv wrap. If you have more than one for an object, what you are seeing may nit be what is selected and exporting. I am finding out the more I do this it is akin to flying. There is a procedure and it must be followed carefully and deliberate every time, I even have formed a mental checklist for building, texturing, uv wrapping, exporting etc. I do the exact same thing. My mistakes are way way fewer now. Hell I went three days unable to get my model 8nto blender. The tuts on YouTube were Nice but they never give you “every” detail.