Hi @Tevon2.0 ,
Generally speaking, the firewall does not authorize the SQL server may cause problems when running the sharepoint configuration wizard. Turn it off and make sure you run with a Farm Account(the login failure prompts that the account used when running the configuration wizard does not have the corresponding permissions).Then run the sharepoint configuration wizard again. After ensuring these two points, if other SqlException-like database configuration problems still occur,you can follow the solution in this article and go to SQL Server Configuration Manager to enable TCP/IP.
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