Calendar Events errors out when clicking on details – the URL

This is an odd issue. We use events + on many subsites, but one subsite is giving an error when event details are clicked. The problem is the url is duplicated and it has a strange http protocol (http/)

For example:


Its kind of odd because other subsites are working fine.

I’ve looked in the subsite settings and in PLESK and I can’t find a place where we plugged in the URL as “http/”

I disabled and cleared our cache engine as well as trying to add a new event (to see if only legacy events were affected).

Any thoughts are greatly appreciated.

As always thanks for your help.