Hope you are well!!
When i try to add a URL with an ampersand in it to the Homepage links - it initially adds fine, but then when editted, the ampersand gets messed up and turns into a ;amp&, breaking the URL.
I presume when the config loads the saved URL, it doesnt convert the & and basically re-saves the ampersand as &amp; etc ad infinitum!
Simple edit of the xml got me running.