I'm trying to add a link to our Slack channel on one of the report pages, so that dashboard users can directly access the relevant Slack channel from the app. There is specific link to be used in the format of slack://channel?team={teamID}&id={channelID}
Whenever I put this in the text box with the link option, it gets set to about:blank in the preview, and then disappears completely.
Is it only possible to use link starting with http: and if so why?