I'm having a similar issue on the new version. When I attempt to setup sync with OneDrive, I receive the popup message: "Error - The sync with OneDrive was canceled by the user." In my case, I do get the standard notification that Enpass has opened a browser window. I authenticated via the browser, but it doesn't make a difference in Enpass; sync does not get setup.
I'm on a OnePlus 3T running Android 8.0.0.
Thank you for your assistance.