Your ROOT_URL in app.ini is http://git.osmesh.ru/ but you are visiting https://git.osmesh.ru/MOS/OpenBoard/commit/eb883d1a74491714712f88f3600fa80dc448812c?style=split&whitespace=ignore-all
You should set ROOT_URL correctly, otherwise the web may not work correctly.
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">OpenBoard is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 3 of the License, with a specific linking exception for the OpenSSL project's &quot;OpenSSL&quot; library (or with modified versions of it that use the same license as the &quot;OpenSSL&quot; library). You can find the source code of this software at &lt;https://github.com/uniboard&gt;</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">OpenBoard is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 3 of the License, with a specific linking exception for the OpenSSL project's &quot;OpenSSL&quot; library (or with modified versions of it that use the same license as the &quot;OpenSSL&quot; library). You can find the source code of this software at &lt;https://github.com/OpenEducationFoundation&gt;</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">OpenBoard is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License below for more details.</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">OpenBoard is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License below for more details.</p>