Your bug report

#36904: 12.1.1; document class completion reports error if beamer is chosen

which was filed against the auctex package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 36904@debbugs.gnu.org.

-- 
36904: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=36904
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