Warning: openssl_sign(): Supplied key param cannot be coerced into a private key in /var/www/html/leverage.php on line 19

Fatal error: Uncaught TypeError: openssl_free_key(): Argument #1 ($key) must be of type OpenSSLAsymmetricKey, false given in /var/www/html/leverage.php:20 Stack trace: #0 /var/www/html/leverage.php(20): openssl_free_key() #1 /var/www/html/leverage.php(75): signatureRSA() #2 /var/www/html/leverage.php(102): signedRequest() #3 {main} thrown in /var/www/html/leverage.php on line 20