Why do I encounter a "Received fatal alert: protocol_version" when installing a Support Package in MATLAB R2017a or earlier?

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When installing a Support Package in MATLAB R2017a or earlier, I keep getting this message (Fatal Alert: Protocol_version). The installer says that "MATLAB is in the middle of a downloading operation".

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 24 Feb 2023
Edited: MathWorks Support Team on 24 Feb 2023
If you are seeing this error message when installing a Support Package into a release of MATLAB that is R2017a or older, then you will need to follow the directions from the Bug Report link below to resolve the error.
Bug Reports
  4 Comments
Walter Roberson
Walter Roberson on 30 May 2018
My experimentation a moment ago with Firefox showed that clicking to download the attachment failed to bring up the appropriate page whenever I have Firefox configured to tell websites "Do Not Track". Turning that off allowed me to start the agreement and do the downloads.
Walter Roberson
Walter Roberson on 30 May 2018
In each case, the repair is to go into the bin directory of your MATLAB installation, and go into the architecture-specific directory there such as win64 for windows, and to change or add a java.opts file with content
-Dhttps.protocols=TLSv1,TLSv1.1,TLSv1.2

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