sorry - thats a bug in the style which shows up with the 'mobile options' add-on, Edit the navbar template in the mobile style and replace.
Code:
<a class="navbar" href="{vb:raw $vbulletin->options['mo37_navbar_home']}{vb:raw session.sessionurl_q}">{$vbulletin->options['mo37_home_link_text']}</a>
with
Code:
<a class="navbar" href="{vb:raw vboptions.mo37_navbar_home}{vb:raw session.sessionurl_q}">{vb:raw vboptions.mo37_home_link_text}</a>
there are a couple others which are addressed in previous pages. check the following posts to see if they apply to you:
https://vborg.vbsupport.ru/showthrea...15#post1989915
https://vborg.vbsupport.ru/showthrea...89#post1977789
https://vborg.vbsupport.ru/showthrea...17#post1962817
https://vborg.vbsupport.ru/showthrea...41#post1946741