Hey @arthur - unfortunately this development pattern is not permitted in Splunk Cloud (and enforced by AppInspect). ... View more

For Splunk Enterprise, dashboard_html_allow_embeddable_content must be set to true in the appropriate app's web.conf; see this discussion for details.   I've tried doing the same thing for a Splunk Cloud instance.  Unfortunately, the custom app fails the app validation during installation in Splunk Cloud because of the configuration changes to the web.conf file.  I've posted a question about this specifically for Splunk Cloud.  I know this post is over a year old but I came across it while Googling for a solution to the problem and thought I'd link to the related posts. ... View more