I removed FreeCAD and installed it according to the wiki manualchrisb wrote: ↑Tue Feb 19, 2019 11:00 pmI move this topic back to help section.
Your version is not a stable version either. The fact that some software manager offers it for installation doesn't make things better. Have a look at https://www.freecadweb.org/wiki/Install_on_Unix and install either current 0.17 or as said before 0.18. Noone here knows which bugs your version has, there have been almost 8000 improvements from yours to the current stable 0.17. If you don't want to use something experimental, don't use that version.
Problem solved, thank you all.