Version 4.20 now in the Google Play Store

Performance Stats has disappeared from my hamburger menu

I can't sync anymore since update. I've restarted both phone and device 3xs. Green dot is no longer there.

I cant sync either. Dont even have that green dot anymore. Devices paired but cannot sync. 

Same here can't sync my Fenix 5 anymore with new version of Garmin connect

Ditto - strongly prefer the previous 7-day sleep data format.  Displaying the sleep data vs. time of day was very useful for viewing trends in wake times and fall-asleep times.  (screenshots attached)  The new format makes it easier to see *how much* sleep you're getting each night, but the lack of time-of-day trends is a severe loss of practical functionality for me.  It would be nice if we could at least toggle back to the old format.

Screenshots of the previous format and the new format:

I am experiencing the same issue: Exactly same screenshot for me: Can't see Vo2Max, Training Effect, etc.. I am using my new Forerunner 945