We are sorry for the difficulties you faced with the new Adobe Express. Which browser are you using?
Have you tried using the other suggested browsers (Safari, Microsoft Edge, and Google Chrome) to see if it makes a difference? Try clearing the browser's cache and cookies to check if that helps.
Also, try restarting your computer.
From Windows browser: Ctrl + Shift + Delete
From Mac browser: Cmd + Shift + Delete
Hard refresh: Ctrl / Cmd + F5 or Ctrl/Cmd + R.
Please let us know if this helps. Also, helps us with a screen recording of the workflow to investigate further.