Not Connected to Mortal Kombat Servers: What is It and How to Fix
By Nathan Fusco

Not connected to Mortal Kombat servers is an error message some players are receiving while playing Mortal Kombat 11.
Sadly, it seems no one at NetherRealm has found an exact fix.
Armageddon is inevitable. #MK11 pic.twitter.com/GiMlpiciOv
— Mortal Kombat 11 (@MortalKombat) May 29, 2019
Not Connected to Mortal Kombat Servers: What is It and How to Fix
On a forum post, an official member of NetherRealm's community team responded with an answer.
"This is interesting issue, can any of you get this tool https://www.netlimiter.com and find out where the connection to the server fails please. If you will need help with it I'll be glad to assist."
You can try all the usual fixes like hard resetting your console, your modem, and or router. Until the problem is fixed, just hope you don't get a similar issues.
Photo courtesy of NetherRealm