All posts redirecting to one page

The problem is that when i add a certain thing to my sidebar, it makes everything on my site redirect to 1 page, as soon as i take it out it works fine again. I developed the theme myself and its still a work in progress, everything has been working up till now though.

My Website: 4tothefloor.co.uk

Here is the code for my sidebar https://pastebin.com/5S7wCTtf

I have highlighted the loop that seems to be breaking my site, as soon as i take that bit out it works ok, just wondering if i have missed something out on there? or if there is a div or something thats missing.