On My end It is showing your Licence is valid till 2021-12-31 but still you can follow below procedures to removce the warning :
If you are using a Campus-Wide License, follow the instructions in the URL below:
How can I update or reactivate my Campus-Wide License?
You might receive this warning when the MATLAB license file on your computer has an expiration date set by your Administrator and needs to be updated. If you are the End User of the license, please follow the below instructions:
To update the license file:
- Open MATLAB.
- Select the drop-down menu under the "Help" button on the toolbar.
- Select "Licensing".
- Select "Activate Software".
- Follow the prompts in the activation client that will now launch.
The license file will automatically be placed into the proper location through this process.
After activating the license, you may need to restart MATLAB in order to implement the change. After restarting MATLAB, if the license file is still not updated, then please contact your License Administrator as they might need to update the expiration date.
If you are the Administrator of the license and you need to change the expiration date of the license, then please follow the instructions in the URL below:
How can I set an expiration date for my license file?
If you still receive this warning after performing the steps above, there may be multiple license files on your computer.
To resolve the issue, remove any additional license files that are about to expire.
For help finding your license files, please see the following article:
Where are the license files for MATLAB located?
A video detailing this process can be found below: