Just to clarify, I only had the issue of being unable to login as owner of my Chromebook after the recent OS update (Version 64.0.3282.190 (Official Build) (64-bit). I am able to login as guest and am able to add user and login.
Questions:
1) What does the red triangle with exclamation point next to my name on the main login screen indicate? Some sort of sync error? Why did that only appear for the first time after the OS update? I am able to sign in to my gmail account through the browser once I've logged into Chromebook as guest or other user.
2) If it is a file system corruption, why am I able to use the Chromebook with any user other than owner? Why would that occur only after the OS update?
3) I cross-posted this issue on the Chromebook Central Help Forum. Other people reported the same issue of being unable to login as owner after OS update and some users reported that doing a powerwash did not solve the issue. They had the same problem of being unable to login as owner even after doing a powerwash.
4) Any other suggestions besides a powerwash? Any way to retrieve/save files/settings of owner without being able to login as owner?