User cannot log in

[filiprybar]

The user cannot log in even if he has a correct username and password. In some cases he can log in, logs out and the next day when he logs in he gets this error message. The username and password are definitely correct.

[alfa24]

Hi,
Unfortunately I think it's quite impossible to investigate your issue when not being on your instance.

[marco.urzi]

HI,
To give you help it would be useful to know the version used.
Furthermore, it would be useful to have more information because in this way it is very difficult to investigate the error.
Greetings