Sanctum Config:

SANCTUM_STATEFUL_DOMAINS=localhost
SESSION_DOMAIN=localhost
SESSION_DRIVER=cookie

Axios

axios.defaults.withCredentials = true;

Clear cookies & restart Docker.

Still broken?

Avoid mixing web + api middleware.

Check cors.php (supports_credentials => true).

Ensure no custom middleware modifies sessions.

Fixed? If not, check browser devtools for misconfigured cookies.