Resolve Error 40: Could Not Open a Connection to SQL Server

error 40 could not open a connection to sql server 2016 error 40 could not open a connection to sql server visual studio error 40 could not open a connection to sql server 2017 named pipes provider, error: 40 - could not open a connection to sql server) report builder error 2 in sql server 20476 sql server error error 53 in sql server a network-related or instance-specific error occurred while establishing a connection to sql server