Getting errors for using the Extract Textures feature. EndLayoutGroup: BeginLayoutGroup must be called first

So in Gorilla Tag they allow custom maps that you make in unity so I got bored and wanted to make one for fun so I just decided to port the map 2fort from TF2 so in blender i installed this addon called “Plumber” that loads source maps and I imported it into Unity (2022.3.2f1 because its the one the gorilla tag maps use) but it doesnt have any textures! I googled EVERYTHING and I found this guide saying to export the model in blender with the settings Copy and Embed Textures so I did that and I put it in unity and pressed the “Extract Textures” and its giving me the error “EndLayout: BeginLayoutGroup must be called first” and wont load the textures! What do I do? (Sorry that this is long as hell lol)