"Schedule" button for workouts doesn't seem to work

I made the same comment here, last night:

and there was another user who seemed to have the same problem.
For me it was resolved & I can now schedule rides in, as I could before.

There is a reply from @xertedbrain a couple of posts further down - he mentioned that it might be a browser refresh issue.
I guess you could always try closing Xert in the browser, re-opening & seeing if it works then? If it doesn’t, then probably best to send support a message.