License server machine for Mathcad is down or not responding.

[SK_10142870]

I am using Mathcad Release 15.0 and Datecodeunknown

License server machine is down or not responding.
FLEXnet Licensing error:-96,491

Here are the errors that I faced
License server machine is down or not responding.
FLEXnet Licensing error:-96,491

[VladimirN · Accepted solution]

Article - "Error "-96, License server machine is down or not responding" when launching Flexnet licensed applications": https://www.ptc.com/en/support/article/CS21768