My students and I have been trying to use express to make simple graphics for our class since last week. We've used Safari, Chrome, and Firefox, and as soon as we get in we can't access text, elements, grids, templates, nothing. Its just a white toolbar to the left of the screen.
Also, we've worked on improving the overall experience and the app performance. I suggest you try the app after clearing the cache/cookies of your browser. Ensure the browsers are updated to the latest version with Javascript enabled.
Let us know if you're still having trouble with Adobe Express.