The Mobile site is back to work now, thanks.
However, there are still a couple of issues on the mobile-site. 1. How do I link the about Page to the About button? 2. the categories: Business, Entertainment, Health, Sci/Tech should have 6 levels, missing Level4, Level5, Level6 for all sections.
Warm-Regards

Hi Anamaria, I just emailed you. Please let me know if you can access the site. Thanks

Sorry, how to attach images here? If you use your mobile phone to access esl-news.com you can see the homepage is not working. Thanks

Thank you so much for the detailed response. 
After I deactivated my mobile AMP plugins and used my web homepage for the mobile it worked. 
My mobile page functioned beautifully for months so I wanted to get it back. After re-installing the mobile and AMP plugins except the homepage is not working, other pages are back to normal. I wonder if there is a bug of some sort. Can you please help me to fix my Mobile Home Page. 
Many Thanks!

Great, done. Thank you so much for your kind help!:)