I changed the cookie settings in admin to try and help me fix an issue where customers couldn't login using chrome. But now I'm logged out.
Please help me.
I've cleared the cache through ftp but still having issues. Thought i'd try and use reset password but thats not working either.
Which setting did you update? Did you update cookie domain? Try to recall the configuration you update and fix it directly from the database core config table.
Resetting password would not help.
you can change the cookie value from phpmyadmin directly, once updated clear the cookies of browser and test it again
core_config_data (table) -> web/cookie/cookie_domain (path)
core_config_data (table) -> web/cookie/cookie_path (path)
Possible causes include
Local computer time vs. server time mismatch, causing instant cookie invalidation. Make sure your server time is correct.
Incorrect permissions on var/session, preventing session files from being saved
Incorrect configuration of database/redis/other session storage, preventing saving of session values
A module is instantiating sessions to early, preventing the correct session names from being set
You're a developer using multiple URLs and have multiple cookie domains
Another developer has somehow modified
app\code\core\Mage\Core\Model\Session\Abstract\Varien.php, creating a hard to track down bug
The cookie domain in System -> Configuration -> Web -> Session Cookie Management doesn't match the actual site domain.
You're using the localhost as your server domain, and using a version of webkit that has trouble/bugs setting cookies for
localhost in some situations.
The short term fix is to just delete your cookie for the domain. That's often enough to solve the problem. If it persists, figure out which of the above reasons is the reason for your error, and take steps to address it (fix permissions, etc.)