Hi. I got the following response
"I think the test certificate that you used to sign the manifest has expired. You would need to regenerate a test certificate, resign the manifest and redeploy it."
to my error
"Customized functionality in this application will not work because the certificate used to sign the deployment manifest for ........."
I clicked on the "Create Test Certificate"buttonand added a password. I though this would have fixed things after redploying but it didn't