Fatal error: Uncaught RuntimeException: Signature header not found in /home/ai410214/testsites.space/www/vendor/bogdaan/viber-bot-php/src/Bot.php:162 Stack trace: #0 /home/ai410214/testsites.space/www/vendor/bogdaan/viber-bot-php/src/Bot.php(204): Viber\Bot->getSignHeaderValue() #1 /home/ai410214/testsites.space/www/index.php(458): Viber\Bot->run() #2 {main} thrown in /home/ai410214/testsites.space/www/vendor/bogdaan/viber-bot-php/src/Bot.php on line 162