Can’t go to user profile anymore

Hello, I’m using Gravity View with the ultimate member to create a user platform.

The basic functionality is users can log in as either a host or a driver. Where they can submit their availability via the gravity form, and then their information displayed on the calendar.

Which is then viewable by all admins. The role capabilities are set up using ultimate member. It’s all been working fine for year or so. However recently. now the link to view the members profile in the calendar has stopped working.

It takes the loggedin user to their profile, instead of the person who has submitted their availabilty. I’ve been using a gravity form merge tag to do this originally:?

<b>{Host or Driver? Please Select:19}</b><i class=”fa-solid fa-user”></i> {created_by:display_name}<i class=”fa-solid fa-calendar-check”></i> Start: {Available Start Date:1}<i class=”fa-solid fa-calendar-xmark”></i> End: {Available End Date:11}[gv_entry_link view_id=”249289″ entry_id=”{entry_id}”]View/edit entry[/gv_entry_link]<ahref=”https://www.gloucestershirenightstop.org.uk/user/{created_by:user_login}”>View profile</a>

The membership directory is no longer working either. It is now showing: We are sorry. We cannot find any users who match your search criteria.

https://www.gloucestershirenightstop.org.uk/user-directory/

The page I need help with: [log in to see the link]