Running Blynk Server on a Digital Ocean Droplet

Hey guys,
I want to run Blynk server program on my cloud.
My server has Ubuntu up and running. I have installed and run the program with this command:

java -jar server-0.39.5-java8.jar -dataFolder /path

But my admin panel is not accessible from outside.
What should I do?

Thank you

Make sure that your server is set to receive admin logins from your IP range.

This is done on this line of the file.