There's a small typo on the web page: https://www.digikam.org/contribute/ "Note ... digiKam with QT_LOGGIN_RULES environment variable." should be: "Note ... digiKam with QT_LOGGING_RULES environment variable." A "G" is missing in QT_LOGGING_RULES
Git commit 7ffc91cadc7cf397a4d5c42fe1c62279edc06531 by Maik Qualmann. Committed on 02/12/2020 at 21:11. Pushed by mqualmann into branch 'dev'. fix typo in contribute page FIXED-IN: 7.2.0 M +2 -2 content/contribute/_index.md https://invent.kde.org/websites/digikam-org/commit/7ffc91cadc7cf397a4d5c42fe1c62279edc06531