419 error, but csrf token is set.

@onyxexception if there's an issue with SSL or HTTPS configuration, it might cause problems with CSRF tokens. Make sure the HTTPS is properly set up and that your URLs use the "https://" scheme.

Also, Make sure the server time is correctly configured. A time discrepancy between the server and the client might result in CSRF token mismatches.

Not that I know of, the SSL certificate is valid, the server time matches. It works neither on my PC nor on my cell phone.

Okay great! CSRF protection may fail if the page is loaded over HTTPS, but the form submission is done over HTTP or vice versa. Make sure that the entire site, including form submissions, is consistently served over HTTPS.

Also, Make sure that the SESSION_DOMAIN matches your production domain, including the correct protocol (https). Check your config/session.php

'domain' => env('SESSION_DOMAIN', null),

If you are using Laravel's caching, try clearing the configuration cache

php artisan config:clear

You might want to clear your browser cache or try accessing the site in incognito/private mode to rule out any browser-related issues.

if your web server is apache, a problem I have seen a few times is stray output in a .php file can cause apache to not send cookies

Check that your site correctly sets a session cookie. You can see this in dev tools in your browser