blank Page when loading on mobiles with mobile theme

[checkhook]

hi guys,

I have this page which loads fine from a pc, on both the normal and mobile themes. It also loads fine from a mobile using the normal theme.

When loading it from a mobile using the mobile theme however, it is just a blank white page.

http://www.checkhookboxing.com/boxingnews.php

The IT guy who created the page (but not the mobile theme, that was done long ago totally separately) provided the below information to post on here.

Followed steps 1 and 2 from here: https://www.purevb.com/knowledgebase...bulletin-page/
Added a variable to step 1 for a plugin
In step 2 referenced the call to the plugin
Created a plugin to include this php file: http://www.checkhookboxing.com/boxingnews-feed.php
Added link to php page created in Step 1 to navigation bar news button to go to: http://www.checkhookboxing.com/boxingnews.php
Important to note on support forum that the above was done with no prior knowledge of vbulletin (site templates set-up by someone else in the past) with exception of last step so any solutions suggested should bear in mind the lack of experience in this field if explaining a solution.

Does anyone have any idea why this is happening and how it can be fixed? Thanks.