I’m able to see the exercises in the Fitness app along with their times, but the green ring doesn’t fill up.

Unfortunately when I try to kick off a new task, I get the error: … This object's deinit, or something called from it, may have created a strong reference to self which outlived deinit, resulting in a dangling reference.

Is this something that can be fixed in a future Xcode beta release, or will we have to install the latest MacOS beta? PreviewProvider produces a separate error 'Fatal Error in SchemaProperty.swift'.