Fatal error: Uncaught Error: Class 'Twilio\InstanceResource' not found in /home/appoint/public_html/booking/vendor/twilio/sdk/src/Twilio/Rest/FlexApi/V1/ConfigurationInstance.php:64 Stack trace: #0 {main} thrown in /home/appoint/public_html/booking/vendor/twilio/sdk/src/Twilio/Rest/FlexApi/V1/ConfigurationInstance.php on line 64