I didn’t have this issue with the last released flatpak of Snorca. I am trying to install the 2.2.4 version of Snapmaker Orca, downloaded off the website. The filename says its Snapmaker_Orca-Linux-flatpak_V2.2.4_x86_64_Beta.flatpak. But when I install it, the installed version in Fedora Software is 2.2.1. And when I start it, the window comes up but then crashes immediately. I think the wrong version of the package got uploaded to the website.
Experiencing same thing here on Nobara 43 (Fedora-based). The appimage works, but I’d rather install it as flatpak.
I have yet to get it to work on Fedora 42 or Fedora 43 (crashes in various ways, sometimes complains abouit the install). I’m doing OK with vanilla Orca, but it’s a bit frustrating.
This has also been posted as an Issue in the Github repo [0]. Is anyone from Snapmaker looking into this? As a new user to Snapmaker the primary issue I currently see is the quality of the software and am concerned that this is a rather big oversight by the company.
[0] 2.2.4 for x86_64 linux crashes after a few seconds. · Issue #164 · Snapmaker/OrcaSlicer · GitHub
So, I was able to build from source on Fedora and it works just fine, I just needed to get the right dependencies. Which means there is no bug that prevents this from working. Which means that the issue is that someone uploaded a broken build. This should be an easy fix, just rebuild latest source and update the download.
For me the same problem. As a workaround i downloaded the 2.2.1 version from github. And that works! 
Better a point release before and a working app. Than the latest (not so) greatest.