Again, this smells like a caching problem like the previous post of your (missing comments).
I see you use Cloudflare, so i can't check much.
We have purged the cache in Cloudflare, so caching is not the issue as of this point. Do you have any other ideas or workaround to make it work? Thank you.
1. Switch to the default theme. And check.
2. Enable WP debug to a log. And check for errors.
3. Disable some or all plugins. And check.
4. Disable Cloudflare. And check.
If all those don't help, i have no ideas.