When encountering the TokenMismatchException error in Laravel, it’s typically triggered during form submissions within your web application. This error occurs because the form being submitted is missing a CSRF (Cross-Site Request Forgery) token.
However, there’s no need to panic. This exception is actually a vital security feature implemented by Laravel to protect your application from CSRF attacks. CSRF attacks occur when malicious websites trick users into executing unwanted actions on your application without their consent.
To resolve this issue, ensure that your forms include the CSRF token by using the @csrf Blade directive or the csrf_field() helper function within your form tags:
<form method="POST" action="/your-route">
@csrf
<!-- Your form fields here -->
</form>
By including the CSRF token in your forms, Laravel can verify the authenticity of the requests, preventing potential CSRF attacks and eliminating the TokenMismatchException error.