Your ROOT_URL in app.ini is http://git.osmesh.ru/ but you are visiting https://git.osmesh.ru/MOS/OpenBoard/src/commit/c74e98bc59ca95dd59dae91a265c2020a86380ff/resources/etc/Tutorial/tutorial_en You should set ROOT_URL correctly, otherwise the web may not work correctly.

новые иконки в OpenBoard

Claudio Valerio 1e8d9e779b tutorial and sankore editor are stored locally		14 years ago
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rw_common/themes/caribou	tutorial and sankore editor are stored locally	14 years ago
index.html	tutorial and sankore editor are stored locally	14 years ago