Warning: Undefined array key "hmac" in /home/watix-shopify-user/webapps/watix-shopify/inc/verify.php on line 5

Fatal error: Uncaught TypeError: hash_equals(): Argument #1 ($known_string) must be of type string, null given in /home/watix-shopify-user/webapps/watix-shopify/inc/verify.php:10 Stack trace: #0 /home/watix-shopify-user/webapps/watix-shopify/inc/verify.php(10): hash_equals() #1 /home/watix-shopify-user/webapps/watix-shopify/whatsapp/whatsapp-plans.php(6): require_once('...') #2 {main} thrown in /home/watix-shopify-user/webapps/watix-shopify/inc/verify.php on line 10