password reset: actiongatekeeper:missingfields

Hi there,

nearly finished my page and testet every function, I finally found this error:

After "lost password" and receiving the mail with the link and clicking on the link, there comes the error "actiongatekeeper:missingfields" (with the according translation, in german it's "Im Formular fehlen die Felder __token oder __ts")

I personally think it should be something about the

$token = get_input('__elgg_token');
    $ts = get_input('__elgg_ts');

(engine/line/actions.php line 129f)

Any idea?

TYIA