Bug#951401: (no subject)
The 64-bit AppImage downloadable from the FreeCAD website also has the same blank print preview behavior. It produces the following error messages in the report pane: QOpenGLFramebufferObject: Framebuffer incomplete attachment. XmbTextListToTextProperty result code -2 XmbTextListToTextProperty result code -2 XmbTextListToTextProperty result code -2
Bug#951401: (no subject)
This affects the version from debian-stable. A workaround is to use the version installed from the Snap Store which works as expected. This is available via Gnome Software by: 1. $sudo apt install gnome-software-plugin-snap 2. Open Gnome Software, allow it to restart and update, then search for FreeCAD. Select the version where the source is "Snap Store" and install.