This was indeed one of an interesting error which I have never seen earlier and it is about DAC Connection.
Here is the complete error message which my client reported.
Learning one new thing every day keeps me passionate about my job. Recently, I had a very interesting experience with one of my customer while working with them on Comprehensive Database Performance Health Check and found some non-default values in sp_configure. They asked me – Which settings change in sp_configure needs restart to take effect? Do we need to remember the values?