FreeCAD AppImage Fails to Start Due to SquashFS Error

If you&rsquo;re trying to install FreeCAD on Linux via an appimage and your running into a Squashfs image uses (null) compression, this version supports only xz, zlib error on startup it&rsquo;s due to a bug in AppImageLauncher. This is a known bug that&rsquo;s been fixed for a few months but at the time of writing this (2025-08-04) the fix hasn&rsquo;t been included in any releases yet.