I just pushed the following fixes to the site:

User Shops We upgraded our version of PHP recently, and one of the changes is that it no longer allows us to set default variables the way we did... years ago. This required a small rewrite to handle the new case, and it has been turned into a function to make that replacement work across the site

User Hovers Same issue

Please report here if either of these continue to not work for you, thank you!