We were able to connect to the database server (which means your username and password is okay) but not able to select the epiz_26596676_XXX database.
Are you sure it exists?
Does the user epiz_26596676 have permission to use the epiz_26596676_XXX database?
On some systems the name of your database is prefixed with your username, so it would be like username_epiz_26596676_XXX . Could that be the problem?
Other Information
I manually updated my wordpress and after updating wordpress asked for language than asked for database details but I am not able to enter these details correctly.
Thanks, I have fixed the issue by entering the details given at http://sv1.scriptinstall.rocks/.
Step 1: Go to cpanel.
Step 2: Click on Softaculous App installer
Step 3: Click on Wordpress.
Step 4: Click on Edit Details ( ) under Current Installations
Here you will find the database details you need.