Integrating WP blog in a folder inside a subdirectory, DB error

Hi!

I integrated a wordpress blog in mi site https://www.o3chiapremium.com, and it works perfect, So, I wanted to integrate another one for my site’s english version, which is contained in a subdirectory https://www.o3chiapremium.com/thebestofchia/

I created a new database with different name than the spanish version, did everything exactly the same, but when I enter to my english blog it says: Error establishing a database connection.

I’m thinking it has to be with the location of the blog maybe? : https://www.o3chiapremium.com/thebestofchia/blog/ Or because there are two in the same site? any ideas?