I have same issue. I will try remove Apple Configurator 2 first and install iTunes 12.6.2 again. (I read about Apple Configurator 2.5 update's conflict with iTunes 12.6.2.)
I removed the symlink all the remaining files from the previous install that I had from the method described in the other topic.
I made some research on the Internet and I didn't find almost nothing. The only relevant match was another iTunes error code beginning with 45 and containing five digit: it was some kind of access violation.
If you find something notable, please, tell us here.