With the recent Dropbox free account unpleasantness, I decided to reevaluate my need for a vault shared among my devices via Dropbox (the way I always used to do it) while all my other vaults were shared among my devices via 1Password.com (new new way I do most of it). I decided that I don't really need the Dropbox sharing, especially if I can't actually do it any more without another $100/year of cost. So I decided to move everything from the vault shared via Dropbox to appropriate vaults shared via 1Password.com. And now my vault on Dropbox is empty (except for items in Trash).
What I Tried
On on of my Android devices, I went into the phone's settings for 1Password, forced stop, cleared cache, and cleared data. Launching 1Password again, I saw the expected new user choices. This time, instead of starting with Dropbox and then adding my 1Password.com account, I went directly to sign in with 1Password.com. I'm sitting at my Mac, so had 1Password there put up the QR code, and scanned it on my Android device (Pixel 2 XL running Android P / 9).
BTW, when I held the phone vertically, the QR code looked stretched into a rectangle. When I held the phone horizontally, it still looked stretched, but 1Password recognized the QR code. Pretty strange, since I haven't seen any such stretching when just using the camera to take photos. And then, after scan but before entering the master password, rotating back to vertical completely exits the account adding. The master password has to be entered while the phone is still held horizontally.
Completing the sign-in process successfully, I enabled the fingerprint reader and "Accessibility", but the "Autofill" setting refused to be turned on. Continuing, I verified that my logins (etc.) were showing up correctly, and then went back into Settings | Filling. Saw "Accessibility" still turned on. Turned on "Auto-copy one-time passwords", and again tried and failed to turn on "Autofill"
So, just for grins, and because I used to use Windows all the time, I rebooted the phone. Going back into 1Password | Settings | Filling, I see that "Autofill" is turned on. So, yay?
1Password Version: 7.1.4.BETA-2
Extension Version: Not Provided
OS Version: Android 9
Sync Type: 1Password for Families
Referrer: forum-search:Autofill Refuses to be Enabled