Email Designer issue

I cannot open Email Designer. When I click on the button a new window opens with the following error: If you need translation it says something like: Critical error occurred on this page. Check your admin inbox for instructions. If the issue persists, check the support forum. I just upgraded to premium, but I was able to use the other new features except this. Also there were no email came through. I checked the Junk folder as well. I use Chrome, but I tried to launch Email Designer in Edge and it gives the same error. Could someone please assist? Many thanks in advance! I apologize for the late reply. I’m not sure how we missed this. The email designer is actually a feature of the premium version, discussion of which is not allowed in these forums ( https://wordpress.org/support/guidelines/#do-not-post-about-commercial-products ). If you could write us via our website ( https://www.fivestarplugins.com/support-center/ ), we’ll be happy to help you in providing more info about, setting up and using that feature.