Why do I receive Error 5201 - Unable to access services required to run MATLAB?

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When I try launch to MATLAB, I get the following error:
Unable to access services required to run MATLAB (error 5201).
How do I resolve this?

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 3 Nov 2022
Edited: MathWorks Support Team on 3 Nov 2022
This error indicates that MATLAB has encountered a licensing issue. Follow the steps below to resolve this error:
1. End the MathWorks Service Host process
Windows
  1. Open Task Manager. This is often done by pressing Ctrl+Alt+Delete on your keyboard
  2. If you do not see tabs such as "Processes" & "Performance", select "More details" in the bottom left corner of the Window.
  3. Navigate to the "Details" tab near the top of the Window
  4. Find MathWorksServiceHost
  5. Highlight it and select "End Task" in the bottom right corner of the Window
MacOS
  1. Open the app Terminal by searching for it Spotlight Search. Spotlight Search is the magnifying glass in the top right corner of your Mac OS screen.
  2. Type in and run: killall MathWorksServiceHost
Linux
  1. Open Terminal. Doing this will vary depending on your Linux distribution
  2. Type in and run: killall MathWorksServiceHost
2. Uninstall and reinstall the MathWorks Service Host
Follow the directions from the link below to uninstall and reinstall the MathWorks Service Host.
How do I uninstall and reinstall the MathWorks Service Host?
3. Contact Support
If these steps do not resolve your issue, please find your Service Host log files, contact MathWorks Support, and send the log files to us. If you do not know where those files might be, please view the link below:
Where are the Installation, Activation, & Service Host log files located for MATLAB?
Contact Support

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