Can't launch on Fedora 41: "undefined symbol: rsvg_handle_get_pixbuf_and_error"

[DumpsterDoofus]

After upgrading from Fedora 40 to Fedora 41, clicking the "Play" button in the Slippi launcher fails to launch Dolphin. I'm using the latest AppImage release. AppImage logs:

$ ./Slippi-Launcher-2.11.6-x86_64.AppImage 
16:10:32.535                                › log.catchErrors is deprecated. Use log.errorHandler instead
16:10:32.543 (replays.worker)               › replays: Spawning worker
16:10:32.727 (replays.worker)               › replays: Spawning worker: Done
16:10:34.063                                › Initializing app...
16:10:34.171                                › Checking for update
generating subfolder tree for folder: /home/user/Slippi
[Error: ENOENT: no such file or directory, scandir '/home/user/Slippi'] {
  errno: -2,
  code: 'ENOENT',
  syscall: 'scandir',
  path: '/home/user/Slippi'
}
generating subfolder tree for folder: /home/user/Slippi
[Error: ENOENT: no such file or directory, scandir '/home/user/Slippi'] {
  errno: -2,
  code: 'ENOENT',
  syscall: 'scandir',
  path: '/home/user/Slippi'
}
16:10:34.351 (dolphin/ishiiInstallation)    › Found existing playback Dolphin executable.
16:10:34.352 (dolphin/ishiiInstallation)    › Checking if we need to update playback Dolphin
16:10:35.095 (dolphin/ishiiInstallation)    › No update found...
16:10:35.677 (dolphin/ishiiInstallation)    › Found existing netplay Dolphin executable.
16:10:35.678 (dolphin/ishiiInstallation)    › Checking if we need to update netplay Dolphin
16:10:36.267 (dolphin/ishiiInstallation)    › No update found...
16:10:37.084                                › Update for version 2.11.6 is not available (latest version: 2.11.6, downgrade is disallowed).
16:10:37.085                                › checkForUpdatesAndNotify called, downloadPromise is null
16:10:37.127 (main/github)                  › Checking cache for: https://api.github.com/repos/project-slippi/Ishiiruka/releases
16:10:37.127 (main/github)                  › Fetching: https://api.github.com/repos/project-slippi/Ishiiruka/releases
16:10:37.131 (main/github)                  › Checking cache for: https://api.github.com/repos/project-slippi/slippi-launcher/releases
16:10:37.132 (main/github)                  › Fetching: https://api.github.com/repos/project-slippi/slippi-launcher/releases
16:10:37.133 (main/github)                  › Checking cache for: https://api.github.com/repos/project-slippi/dolphin/releases
16:10:37.133 (main/github)                  › Fetching: https://api.github.com/repos/project-slippi/dolphin/releases
[13969:1214/161039.507530:ERROR:gl_surface_presentation_helper.cc(260)] GetVSyncParametersIfAvailable() failed for 1 times!
16:10:39.936 (dolphin/manager)              › Launching dolphin at path: /home/user/.config/Slippi Launcher/netplay/Slippi_Online-x86_64.AppImage
16:10:41.019 (dolphin/manager)              › Dolphin exit code: undefined
16:10:41.022 (dolphin/manager)              › Dolphin exit signal: undefined
16:10:41.072 (dolphin/instance)             › Received Dolphin stderr message: Gtk-Message: 16:10:40.455: Failed to load module "colorreload-gtk-module"
Gtk-Message: 16:10:40.455: Failed to load module "window-decorations-gtk-module"

(AppRun.wrapped:14099): Gtk-WARNING **: 16:10:40.495: Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.
**
Gtk:ERROR:../../../../gtk/gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /usr/share/icons/breeze/status/16/image-missing.svg: Unable to load image-loading module: /usr/lib64/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader_svg.so: /usr/lib64/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader_svg.so: undefined symbol: rsvg_handle_get_pixbuf_and_error (gdk-pixbuf-error-quark, 5)

[13969:1214/161042.163017:ERROR:gl_surface_presentation_helper.cc(260)] GetVSyncParametersIfAvailable() failed for 2 times!
[13969:1214/161044.779388:ERROR:gl_surface_presentation_helper.cc(260)] GetVSyncParametersIfAvailable() failed for 3 times!

It says undefined symbol: rsvg_handle_get_pixbuf_and_error, which appears to be a function in Rsvg but I'm not sure how to debug further.

OS info:

$ cat /etc/os-release 

NAME="Fedora Linux"
VERSION="41 (KDE Plasma)"
RELEASE_TYPE=stable
ID=fedora
VERSION_ID=41
VERSION_CODENAME=""
PLATFORM_ID="platform:f41"
PRETTY_NAME="Fedora Linux 41 (KDE Plasma)"
ANSI_COLOR="0;38;2;60;110;180"
LOGO=fedora-logo-icon
CPE_NAME="cpe:/o:fedoraproject:fedora:41"
DEFAULT_HOSTNAME="fedora"
HOME_URL="https://fedoraproject.org/"
DOCUMENTATION_URL="https://docs.fedoraproject.org/en-US/fedora/f41/system-administrators-guide/"
SUPPORT_URL="https://ask.fedoraproject.org/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Fedora"
REDHAT_BUGZILLA_PRODUCT_VERSION=41
REDHAT_SUPPORT_PRODUCT="Fedora"
REDHAT_SUPPORT_PRODUCT_VERSION=41
SUPPORT_END=2025-12-15
VARIANT="KDE Plasma"
VARIANT_ID=kde

[DumpsterDoofus]

Realized this is a duplicate of project-slippi/Ishiiruka#429.