I am a new user just setting up 1Password on my devices. I had successfully set up 1Password on my iMac, synced with iCloud, and successfully installed it on my laptop, my iPhone and iPad. I was beginning to upgrade passwords on some websites (successfully) when I noticed my master password no longer worked on my iPhone and iPad. I made multiple attempts but to no avail. I then went back to my original iMac where I first installed the OSX version, locked 1Password, and then attempted to log back in. It would not work. Now I am locked out of all my devices. I only set up the Master Password once and did not attempt to change anything. Everything seemed to be working fine but then suddenly nothing worked.