I just had a very strange error message in my visual studio 2010 SharePoint project…
When building the project everything goes well, but when packaging it or deploying it I got this error message:
“value cannot be null parameter name publickey”
Also, trying to open the package editor in visual studio to take a look at the “preview of packaged manifest” showed me the same error:
Google did not prove to be useful as I did not find anything close to this error message.
Well, in the interest of saving you time, let me just say that after some search around the project I found that the strong name signing of my project was missing the signature file (SNK), which produced an unsigned DLL, and as such – I guess caused this issue with the package building.
Hope this will at least save some time to anyone else out there,