I'm having the same issue with 6.2.2.1 since yesterday and I have done the netflix clearcookies.
Is a reboot required or what are the next steps?
BuddyJet
Open the "Hamburger Menu" (3 lines top right) select Settings
- look where is your Temp Directory, close SF
- open the Temp Directory - there is subdirectory cache
- delete this - or better rename only until login works fine =>
sampleIf there were too many logins with one IP ..
.. it could help to change the IP (VPN in case of doubt - like
here)