Error establishing a database connection

Hi Guys,

I’m facing this error every 6 hours on my E-Commerce site. My hosting is bluehost (Dedicated Standard Web Hosting).

I optimized my website a while ago using WP Rocket and Asset Cleanup Pro. From Rank F to Rank C. Deleted also some of the plugins. I also installed Jetpack plugin on my site.

What do you think is the root/main cause of the error?

Thanks guys

The page I need help with: [log in to see the link]