Code Signing Error in Visual Studio 2019

Question

I am trying to sign an output program from my Visual Studio 2019 build with my recently issued certificate. However, I get the following error:

SignTool Error: An unexpected internal error has occurred.
Error information: "Error: SignerSign() failed." (-2146893779/0x8009002d)

I get the following error both within Visual Studio (using the Signing page for the project properties) and through the CLI tool. I did try running the command with debug as a flag, but it ends up stuck in the same error message above. I have successfully signed the software with a test certificate.

I’ve tried looking online for support but cannot find helpful information.
Are there any experts in Code Signing for C# projects for Visual Studio that could help me out?

Answer 1

I figured out what was wrong today -

Looking under the log files for our certificate provider's tools - I found that it was unable to find the certificate file at the path specified by the environment variable. I updated the path and it works now.

For future reference, check environment variables are set correctly