Regarding website crash down

That’s part of your server configuration, not WordPress.

WordPress should work just fine under FastCGI, so it might be server configuration issue.

What version of PHP are you running?

Running PHP version: 7.2.22

Any chance you can upgrade PHP to the 7.3 branch?

Maybe I will have to see.

you think it the problem of the PHP version?

Not specifically, but I suspect it’s a problem with the PHP configuration, and updating PHP is generally the easiest way to rule that out.

Plus, we recommend PHP 7.3 or higher. ??

Okay, I will do it and let you know.

Thanks a lot.