In Connector builder, the Preview for Activity designer is not loading.
In Connection builder, Activity Designer preview is not loading even though the API request is successful.
The Preview component in Activity Designer uses Studio Web components to function. If the preview does not load, it is likely that this is because a web domain that Studio Web relies on is getting blocked. This can be confirmed from Browser -> Dev Tools -> Network.
To resolve this, you will need to have the domains listed in our documents whitelisted in your firewall: