My UWP app was updated successfully before. But I had a problem these days. When I created a new package with Visual Studio 2017/2019, an error was reported as follows.
Error: Failed to sign &amp;#39;AppName_126.96.36.199_x86.msix&amp;#39;.
I know that the error might be caused by lack of a certificate. If so, I have a couple of questions:
1. Why was the package creation successful before (last month)? Does it mean that we cannot update an existing app without a certificate in the future?
2. As an individual developer, how and where can I request and install a trusted certificate?
Any help will be greatly appreciated.