By knalstaaf on
If this happens and there's no clear solution for this, it could be caused by cookies left around in Firefox.
If you use the Firefox Webdeveloper Toolbar, go to Cookies > Delete domain cookies. This solved the issue in my case.
Comments
Check your spelling of domain name
I was looking for more complicated solutions, until I looked closer at my settings.php file and noticed I had left an "s" off the end of the domain name. Double-check your code and make certain you have spelled the domain correctly. I know it won't happen to you, but it did to me. ;-)
Same issue here trying to configure the CKFinder (CKEditor)
Hello
I managed to solved this issue with the following code inside settings.php file: