As the title states, it would appear that the latest vs2019 update finally removes the deprecated
std::tr2::sys namespace, which Cinder 0.9.1 relies on for its path. I’ll see if I can possibly figure out how to update this and provide a fix that allows anyone to still use Cinder 0.9.1 alongside the v142 toolset, but last time I tried replacing
std::tr2::sys with something more contemporary, lots of other things broke.
So if anyone runs into the same issue as me I’d recommend simply stepping down to v141 (the Vs2017 toolset). I’ll be doing that myself if I can’t figure out how to fix things.