ERROR: Could not find a version that satisfies the requirement sip==4.19.8 (from pipgui) (from versions: 5.0.0, 5.0.1, 5.1.0, 5.1.1, 5.1.2, 5.2.0, 5.3.0, 5.4.0)
ERROR: No matching distribution found for sip==4.19.8 (from pipgui)
I have sip 4.19.21, which is newer than 4.19.8.