[Gelöst] Arabic site is showing some weird stuff on the header

Background of the issue:
I am trying to fix the top header line of codes things: versteckter Link on my Arabic site.

Symptoms:
The Arabic site is showing some weird stuff on the header, and instead of fixed errors, I got a page full of errors.

Questions:
What is causing the weird stuff on the header?
How can I fix the errors on the page?