I recently changed my hosting plan with the same hosting service provider. Along with the plan they also changed my hosting server and deactivated the previous. I was forced to migrate and use a back-up file to restore my site. But unfortunately I am not able to retrieve my website. When I transfer the data and try to access the wp-admin it gives an error 'Error establishing a database connection' Also, I am not able to visit the site. When I try visiting the website, a blank page shows up and no error is shown. Need help how to restore my website using the back up archive provided by the hosting company.
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