Hey @AlbericoD,
I also found “extension-frame” iframe style property is set to “display:none;”. If I remove that I can see my extension view in online test mode.
I further investigate and found that Line 183 of “./developer-rig/public/coordinator.js” is setting iframe display style property to none.
I believe this must be intentionally. Need your help here to understand why my iframe display style property is set to none in live mode. Whereas it is fine in local test.