Error-Notice

Hi I am using your plugin on a WordPress-Site, and we have a bug there:

Notice: Undefined index: redirectAddress in /home/publish1/public_html/v3.publishingblog.cyon.site/wp-content/plugins/crowdsignal-forms/includes/frontend/blocks/class-crowdsignal-forms-poll-block.php on line 74

Can you help me with that?
One example is here: https://v3.publishingblog.cyon.site/hotfix-fuer-indesign-15-1-erschienen/ (password: sayhellotov3)

The page I need help with: [log in to see the link]