Enfold Avia Layout Builder Not Loading – Spinning Circle

I’ve tried disabling plugins, updating WordPress, updating the theme, recovering, and returning to an older backup. I’ve followed every suggestion listed and I cannot get the circle to go away, do anything but spin in Layout Builder. I’ve opened in private window, cleared cache and cookies to no avail. I cannot work on my client’s sites. I can see the layout, content, and media elements, but where these should appear is a spinning circle. Nothing is there. Please let me know if you can figure out what is going on. Then please explain how you fixed it, so I can apply to other Enfold sites with the same issue. Thank you.