Hello, Thank you so much for your prompt reply.
I just check the Site Health and there are not any test failures for the “loopback requests” as this picture: http://prntscr.com/q74bus
However, My website has other failures that im not sure if it is relevant to the error. Please see the picture here: http://prntscr.com/q74c6i
I also would like to list the plugin I used in my website in case they are conflicting with AMP: (although I deactivated all plugins (except AMP) and continue the same errors so i think that is not the reason)
1. Akismet Anti-Spam
2. Autoptimize
3. Classic Editor
4. Wordfence Security
5. WP-PostViews
6. Yoast SEO
Thank so much for your help.
