The wiki isn't displaying any text when viewed normally. However, when you view the source, it displays the text.
I think I found the solution to the issue, I am just unable to implement it as I don't have required access.
the solution I found can be found here: https://www.mediawik..._text_is_thereĀ
Hope this helps, and look forward to the issue being resolved.
Best regards,
shelms488