Your ROOT_URL in app.ini is https://scm.trinitydesktop.org/gitea/ but you are visiting https://scm.trinitydesktop.net/gitea/TDE/tqt3/src/commit/eb42871e999672a8fad5793733c58be05928c8ea/doc/html/coordsys.png
You should set ROOT_URL correctly, otherwise the web may not work correctly.