Your ROOT_URL in app.ini is http://git.osmesh.ru/ but you are visiting http://91.221.70.94:3000/MOS/OpenBoard/src/commit/ff87df38c450e3ead0aea9e3aa5b6d86e0a73bb6/resources/etc/Tutorial/tutorial_fr
You should set ROOT_URL correctly, otherwise the web may not work correctly.