Wrong class name isn't exception but error of who made that class.

Author: stefanak-michal

src/protocol/AProtocol.php

@@ -89,14 +89,13 @@ protected function read(?int &$signature)
     /**
      * Returns the bolt protocol version as a string.
      * @return string
-     * @throws Exception
      */
     public function getVersion(): string
     {
         if (preg_match("/V([\d_]+)$/", static::class, $match)) {
             return str_replace('_', '.', $match[1]);
         }
 
-        throw new Exception('Protocol version class name is not valid');
+        trigger_error('Protocol version class name is not valid', E_USER_ERROR);
     }
 }