External links not working in Linux AppImage

I've been trying out playing on Linux and for some reason the mod manager fails to open external links. For example, the "Help" and "SMM GitHub" buttons on the sidebar don't do anything and neither do links in mod descriptions (although direct links to other mods do work within the app). Other than this the mod manager seems to work just fine.

Running the AppImage from a terminal produces this output when clicking a link:

kde-open: symbol lookup error: /lib/x86_64-linux-gnu/libcurl-gnutls.so.4: undefined symbol: nghttp2_option_set_no_rfc9113_leading_and_trailing_ws_validation
2025-12-06T16:37:52-05:00 ERR backend/wails_logger.go:31 Unable to open default system browser

I wouldn't be surprised if this is some issue on my end, but it's my understanding that AppImages are supposed to be distro-independent so I figured I'd bring it up here.

If it helps, I'm running Kubuntu 25.10 (KDE Plasma 6.4.5 on Ubuntu 25.10).

Start with the external-link opening path associated with backend/wails_logger.go:31 and reproduce the failure by running the Linux AppImage from a terminal. Check the Help, SMM GitHub, and mod-description links; done means external links open in the system browser without the kde-open symbol lookup error.