Yesterday while working on a presentation, I came accross this issue in a Joomla 2.5 site where none of the users or admin cud login though we double checked that the correct credentials were being used.
There was absolutely no error message shown.
The cause I found soon after was that the variable cookie_domain had been set to something and my site was then on a local server.. make sure this is blanked out to solve the problem..
Comments
it looks like
the variable i am talking about is in the joomla config.php
Thanks a lot
1000 thx.
magento extensions