How and where to request and install a trusted certificate

Question

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 'AppName_1.1.3.0_x86.msix'.

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.

Answer 1

Hello

Welcome to Microsoft Q&A!

There are other people that meet the same question as you. Currently, a working solution from the Developer Community of Visual Studio here: Failed to sign appx is that you could try to uninstall Windows Update (KB4535996) and reboot.

If this doesn't work for you, please let me know.

Another thing is that right now Microsoft Q&A is under public preview, all the topics that supported now are listed in the right top. For questions about publishing UWP apps, you could ask in Submitting and Publishing Apps Forum in MSDN.

Thank you.