There must be && in place of || in the if-condition on line 290.
core/units/helpers/curl_helper.php
public function SetRequestMethod($request_method)
{
if ($request_method != self::REQUEST_METHOD_GET || $request_method != self::REQUEST_METHOD_POST) {
throw new Exception('Method "' . __METHOD__ . '": Invalid $request_method parameter value');
return ;
}
$this->requestMethod = $request_method;
}