Failed To Open Loopback Connection

Arun Sirpal diagnoses a connection problem:

I could not read my error log on one of my local SQL Servers, when I executed the following code:

EXEC sp_readerrorlog

I received the below:

Msg 22004, Level 16, State 1, Line 2 Failed to open loopback connection. Please see event log for more information. Msg 22004, Level 16, State 1, Line 2 Error log location not found.

Fortunately, the error logs had a bit more detail, so Arun has the answer for you.