[Solved] Problem with self-signed certificates on Windows 10

Either you need a new certificate installed for this app package, or you need a new app package with trusted certificates. Your system administrator or the app developer can help. A certificate chain processed, but terminated in a root certificate which isn't trusted (0x800B0109).

The mentioned problem occurs when user try to install a windows 10 app from a unknown publisher or a app with un-trusted certificates. This issue leads to developers not be able to install self-signed apps in a third computer.
Actually this happens when a proper certificate is not installed in the root certificate directory. In order to solve this problem, you need to proceed as follows-

Step 1-
Ensure that you have exact the same problem, if yes then right click on '.appxbundle' project and open the 'Properties' window.
Click on the 'Digital Signature' tab.

Select the certificate associated with the package and click on 'Details'.

Step 2-
From the open pop-up window 'Digital Signature Details', select 'View Certificate'.

Now click on 'Install Certificate'. A new 'Certificate Import Wizard' will be showed up.

Step 3-
Choose 'Local Machine' under Store Location and click Next.
Choose 'Place all certificates in the following store' and browse for 'Trusted Root Certification Root Authority' and click 'OK'. Then let it install.

Click 'Finish' and you're done. You'll receive a 'Import was successful' message.


You can now try to install your app package again. Don't forgot to install Dependencies before installing the package.