Links in html-mails not rendered

[zabinetta]

Hi Folks,
I had a problem in my html-mails (information, registration and unsubscribe), because the links were not rendered. This was because the f:link.action-viewhelper had no value to put the link upon.
I changed to (unsubscribe-Mail):
<f:format.html> {f:translate(key:'mail.info.deleteLinkText')}<br>{f:uri.action(action: 'delete', arguments: {hash: hash}, controller: 'Address', extensionName: 'registeraddress', pluginName: 'registerform', noCacheHash: 1, pageUid: settings.pagewithform, absolute: 1) -> f:format.htmlentitiesDecode()} </f:format.html>

TYPO3 is 8.7.24, registeraddress is 2.0.1
with the best regards,
Sabine