Thread:Talk:Release notes/1.22/Disable collapsible sidebar/reply (2)

Found it! in the file skins/vector/vector.php

change the line $out->addModules( array( 'skins.vector.js', 'skins.vector.collapsibleNav' ) ); to $out->addModules( array( 'skins.vector.js' )); # 'skins.vector.collapsibleNav' ) );