In December of last year, the ACM published an overhaul of the LaTeX document template:
so, I'm trying to migrate a conference paper of mine from "SIG-ALTERNATE.CLS - VERSION 2.8" to this new template, and even though I seem to be issuing the correct documentclass command:
just like in the sample conference paper, and yet - I get:
! Package xkeyval Error: `format' undefined in families `include/acmart.cls'. ... ! Package xkeyval Error: `screen' undefined in families `include/acmart.cls'.
and so on. Why is that?
Note: If this isn't a well-known/easy-to-identify issue I'll try to extract an M(not)WE from the paper.