Hi I have the same issue. Tried your link and still the search/dropdown list of universities doesn't appear (irrespective of the University name I type). Have attached a screenshot.
Thanks for your patience while we looked into this issue.
The reason why you're experiencing this is that SheerID is currently reindexing their list of schools available in the drop-down menu each day for a few hours. This causes the menu not to work as expected or not to work at all. We've already reported to SheerID that some of our users might still face the issue.
In case you experience it, make sure to try again in an incognito window or using a different device to ensure there's no old content displayed due to cached browser data.
Let us know how you get on! We'll be here in case you need any further help with this.