Problem: Webhook URLs are not saved, which breakes the entire webhook functionality.

Reproduction: When creating a new dialog skill in the classic experience, the following error is printed to console once I've entered a webhook URL in the respective options field.

DialogSkillOptions.jsx:210 Uncaught (in promise) TypeError: Cannot read properties of undefined (reading '0')
at DialogSkillOptions.jsx:210:42
at s (bluemix-analytics.min.js:44:30656)
at Generator._invoke (bluemix-analytics.min.js:44:30409)
at Generator.next (bluemix-analytics.min.js:44:31019)
at C (app.46eb13fc2099d97e0fdd.js:1:3312231)
at i (app.46eb13fc2099d97e0fdd.js:1:3312434)

If one then tries again to change the URL, no error is thrown. However, the URL is still not saved correctly (trying to use it in a dialog node displays the "webhook URL missing" warning box).

For the URL I used different examples, including the one from documentation.