“Error establishing database connection” is a warning message that can be somewhat is one of our top support requests. This frequently happens when someone attempts to load a webpage and all you see is a white box with this baffling warning message. This warning implies your website is unable to communicate with a WordPress database connection which beings down your entire site.
The most common errors establishing a database connection in WordPress
Invalid Sign-in credentials
One of the most common issues is that the credentials of databases are not…