Sep 20, 2019 05:50 AM|Yang Shen|LINK
I am unable to find out what instance its trying to connect to or what the issue is.
You can see the connection string in your web.config file <connectionStrings> OR you can see it in your current code, find it in sqlconncetion.
Only with the error message you provided is really hard to guess what's wrong. Maybe some related code?