Oh gosh, the person who could probably help you with this is attending an Inkscape Hackfest (a period of a few days per year when developers meet in person for intense hacking sessions, planning and decision making about the course of Inkscape's development).
I guess she might visit this week if she gets a chance, but it might be this weekend before she has time.
There is one short string that I could venture a guess on, as part of the problem, although I don't know why it would work in 0.92.2 but not in 0.92.3.
In one place it says "Image type 'xpm' is not supported". I might guess that there are images with XPM format (although to be honest, I've never heard of such a format) which isn't supported (can't be displayed).
Oh, I see she's posting at this moment in Launchpad, Inkscape's bug tracker. I don't know if she is answering new bug reports, though. It's more likely she's updating reports as the hackers are working on them during Hackfest.
But since you already have most of the required data for a good bug report, and just the fact there seems to be a big difference between versions, it sounds like a good chance you've found a bug, so I'd suggest you post there. This page can give you the basics of what you need to make the report:
https://inkscape.org/en/contribute/report-bugs/ (Include everything you've included here.)
It's possible someone might see your report and be able to help you there, sooner than someone can help you here. I apologize for the delay.