Thank you. I reached out to Bluehost and they cleared all cache on the server. Everything works now.
I have deleted /wp-content/mu-plugins/endurance-page-cache.php, and also disabled 10Web Booster plugin and deleted all caches in these folders wp-content/cache/all and wp-content/cache/wpfc-minified. The problem still exists. whatever do I have to do?
Thank you so much for helping me in this matter.
