I fixed the incorrect tag usage. ALL edges and faces should be untagged.
I purged unused stuff from the model. This resulted in slightly more than an 80% file size reduction. Interestingly all of the components in the model are unused. Your entire model is loose geometry which will create problems for you when you need to modify things.
There’s lots of stray hidden geometry which I cleaned up and for some reason your model is located at a great distance from the origin.