AI smartobject doesn't open from Photoshop
This is an old bug THAT IS BACK!!! Double clicking an AI smart object in photoshop opens Illuistrator but it doesn't open the object. You have to close Illustrator completely and do it over again until it works.
Please accept my sincere apology for the inconvenience. Please get in touch with us at any of the other support channels – https://helpx.adobe.com/support.html . Since this is not a generic issue that we can reproduce at our end, we will need someone to look into your machine to figure out what is going on here.