Version 5.0.0 beta 10

system/MFA/Authy/Handler.php

@@ -830,7 +830,12 @@ class Handler extends MFAHandler
 		
 		if ( $method == 'get' )
 		{
-			$response = $url->setQueryString( $data )->request()->get();
+			if( $data !== null )
+			{
+				$url = $url->setQueryString( $data );
+			}
+
+			$response = $url->request()->get();
 		}
 		else
 		{