Fixed after a tlmgr update with acmart version 1.92.
See here for info:
https://github.com/borisveytsman/acmart/issues/505
# Armenian currently only works with XeTeX and LuaTeX and system fonts
export/examples/Language_Support/Writing_Armenian_(dvi|dvi3_texF|pdf|pdf2|pdf3|pdf5_texF)
-# ! Package hyperxmp Error: hyperref must be loaded before hyperxmp.
-# https://github.com/borisveytsman/acmart/issues/505
-export/templates/Articles/Association_for_Computing_Machinery_%28ACM%29_pdf2
-
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Sublabel: externalissues