Your session cookie is invalid. Please log in again

Symptoms

You occasionally receive the following message when accessing cPanel, WHM, or Webmail.

Your session cookie is invalid. Please login again

Description

The message occurs when the session cookie in the browser's cache doesn't match the session cookie on the server.

Workaround

Clear your browser's cache or use a private browser or incognito window.

Additional resources

How to Clear your Browser's Cache