Laravel csrf token mismatch for ajax post request

It usually happens when the tokens don't match in both sessions and are sent and received in requests.
A CSRF token keeps Laravel safe from attacks that try to get it to make requests from other websites.

Common Reasons for CSRF Token Mismatch 

Here are the most common reasons why developers run into this error:

• The request did not include a token.
• The session has ended.
• The cookie domain or path doesn't match.
• The token is not being sent with the AJAX request.
• Old pages are stored in the browser's cache.
• Settings for the session driver are wrong
• Problems with HTTPS cookies
• Incorrect setup of middleware
• Problems with permissions in Laravel storage folders