Every day when I come to the office and try to unlock 1Password through Chrome Extension I get:
As a workaround I go to 1Password Windows application and unlock it there. Then return to Chrome and it starts working.
It claims about incorrect password but I'm sure it's correct for 100% because I use it in win app and it works there.
Windows 7 Professional (SP1)
Chrome 41.0.2272.89 m
1Password Chrome Extension 188.8.131.52
1Password App 184.108.40.2068