There was an error signing

Question

I support a large WPF application that is inherited from another developer. I use ClickOnce to publish it. Suddenly, today I received an error message: Error 2 Cannot publish because the project could not be created. eleven
Error 3 An error occurred while signing: Failed to signup bin \ Debug \ app.publish \ setup.exe. SignTool error: no certificates were found that met all the specified criteria.

I have a file called SomeName.snk, which is specified in the project settings, Signing tab. I have no idea what happened today that caused the problem. I am using VS 2012.

Answer 1

I will check if the certificate has expired. Most (all?) Certificates have a validity period.

Answer 2

Go to the main project of the property > Signing > If the validity period has expired> click Create test certificate , the password is optional, and you are done.

Answer 3

Have you checked the certificate?

View or manage your certificates

You can use MMC Snap In or Internet Explorer.

Answer 4

I had this problem when installing visual c ++ on top of the .net VS2017 installation. I solved this by unchecking Properties → Security → Enable ClickOnce Security Settings.

Then he created the app.manifest file. After that, the error went away. Interestingly, I checked this again to see what happens and the problem did not return.

Answer 5

Today I ran into a problem. In my particular case, it was caused by this Microsoft Windows Update .

I uninstalled this update and the publication started working as always. This is temporary work and means that you should probably recover your keys / certificates.

Answer 6

This mainly happens if your certificate for this particular project has expired or problems have occurred.

Right-click Project → Properties → Tab - Signing tab → More Details button → Shows the details of your certificate. Check if your certificate has expired

Ways to fix

1. Uncheck "Sign ClickOnce manifests" and try

2. Extend the certificate by creating a test certificate (if your certificate has expired)

• Click the " Create Test Certificate ... "
• Enter your credentials (optional)
• Save

3. Reconfirm the existing certificate (if your certificate has not expired)

• Click the "Select from file" button and use an existing key file (for example, .pfx).

OR

• Click the "Select from store" button and select one of the available options.

Tip: if you are still having problems creating your project. Just restart Visual Studio.

Hope this helps.