The specified license file is invalid. (Error Code:0x2800120)

I am reaching out to seek assistance regarding an issue I have encountered with the Unity VSA community version 5.3.
After several installations of the latest Unity VSA and generating the license file, I continuously receive the following error message when attempting to upload the license:
"The specified license file is invalid. (Error Code:0x2800120)"
Despite following the recommended procedures, I have been unable to resolve this issue.
Could you please provide guidance on what might be causing this problem and how I can successfully upload the license file?