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/e37b3ac7a3e7e3b8990398a5beafe3355aa11779/resources/etc/Tutorial/tutorial_fr/CSS
You should set ROOT_URL correctly, otherwise the web may not work correctly.