Garmin connect stopped reporting my body battery ( vivo smart 4 ) 3 days ago. Since then it says "no available data". It has worked well for about a year. Any ideas?

Time has not fixed this as I thought it might.

It is a shame as I have found the body battery to be a useful diagnostic.

Try sync from computer. If it still doesn't work, you could reset it (done on device).

Exactly the same result but in  a different format.

So it works on computer? Have you tried if it now works on phone?

What I was getting at in my first post, was that I once experience sync problems, but syncing on computer fixed it (first sync on computer also failed, but second one succeeded).

No! It stops at exactly the same point in time. Look at the dates. The problem is with the underlying data. 

I did this and it seems to have solved the problem.  Thank-you.
Wonder what caused the issue?