ClickOnce signer's certificate not valid for signing when using makecert/pvk2pfx

Question

All of a sudden my unexpired certificate created using makecert/pvk2pfx is throwing an error when attempting to publish a ClickOnce application. This worked

Answer 1

After using the -r switch (create a self signed certificate) with Makecert, the pfx certificate generated with pvk2pfx now works for ClickOnce publishing... I am not sure exactly what happened here since the old key that was not "self signed" worked fine for a long time...

Exact commands I used to create the working pfx certificate...

makecert -sv MyApp.pvk -n "CN=MyCompany" MyApp.cer -r

pvk2pfx -pvk MyApp.pvk -spc MyApp.cer -pfx MyApp.pfx