Fatal error: Uncaught Error: Class "Illuminate\Mail\Mailable" not found in /opt/lampp/htdocs/myhospitalnow/mhn-core-ms/app/Mail/OtpVerificationMail.php:12 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/myhospitalnow/mhn-core-ms/app/Mail/OtpVerificationMail.php on line 12