Why do I receive MathWorks Licensing Error 99?

Why do I receive the following error:

MathWorks Licensing Error 99.

A licensing error occurred while trying to use <PRODUCTNAME>.

Answer 1

[MathWorks Support Team]

This FlexLM error does not occur when using MathWorks licenses. Please ensure that the user is using a MATLAB license file and that there are no license files in the "licenses" folders that belong to other software products not owned by MathWorks.

Where can I find MATLAB license files?

https://www.mathworks.com/matlabcentral/answers/99147