smux provider :physical connection is not usable

Hello,

We are using one ERP called as Jenzabar. And we are using SQL server 2012 sp2 database. We upgraded this ERP yesterday.

One of our employees gets smux provider: physical connection is not usable.

What does this mean? I have never had this kind of error before? Is this an error that I need to concern about, or I can ignore it? Did you ever have this kind of error before? How did you get rid of this error message?  

I am also attaching a screenshot of this error message.

Thanks