[corona]

Just a thought, but would your username / password include any unicode (non-ascii) characters? We've had a lot of unicode issues with the plugin, perhaps this could be related.

I've changed my user name to name contained only letters, but error message is still the same - You are not logged in. Check your credentials and/or restart the addon.

My best suggestion is the final option in advanced settings to reset addon, this will delete all addon data. This will definitely delete any cached cookies/settings and allow you to put user/pass in fresh. Hopefully that'll work then.