Why do I receive the error "You are not licensed to use R20XXx?" when I try to launch MATLAB?

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Why I do receive the following error message when trying to launch MATLAB?
You are not licensed to use R20XXx.
For help, contact your license administrator or MathWorks Support.

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 3 Nov 2022
Edited: MathWorks Support Team on 3 Nov 2022
If you are receiving this error, it means your MathWorks Account is not linked to a license for this release. You must link to a license with that release and restart MATLAB. Clicking the link in the error will bring you to your MathWorks Account page where you can link to a license.
If the link in this error is not working, please click the link below to go to your MathWorks Account and link to a license.
My MathWorks Account
Alternatively, contact your IT Department for instructions on how to link to an available license.
If your MathWorks Account is already linked to a license eligible for the release of MATLAB you are attempting to use, locally stored license information on your computer may be corrupted. Perform the following steps to regenerate the license information:
1. Make sure your computer is connected to the internet
2. Remove the .mwlicx file
Windows: 
C:\Users\%USERNAME%\AppData\Roaming\MathWorks\licensing\licenses\
Linux: /home/$USER/.MathWorks/licensing/licenses/
Mac: ~/Library/Application Support/MathWorks/licensing/licenses/
3. Restart MATLAB

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