Synfig Appimage Dont Run

hello! I installed synfigstudio from pamac, but the program doesn’t work properly. Then I tried downloading it from the website the appimage format, but it couldn’t work. when trying to run via terminal:

/tmp/.mount_sU1FGE/usr/bin/synfigstudio: /tmp/.mount_sU1FGE/usr/lib/ version `GLIBCXX_3.4.30’ not found (required by /usr/lib/

If it doesn’t work properly, then please explain what, or report an issue to the developer: Issues · synfig/synfig · GitHub

Seems to be a known problem: Appimage from version 1.4.4 does not run in Arch Linux · Issue #2963 · synfig/synfig · GitHub

when i try to import bitmap, it dnt work, nothing happen.

i have tried to follow your link for appimage - and now the program appimage can run. but the problem remains the same. I cant import bitmap file.