Hi. I installed spotify linux preview http://www.spotify.com/us/download/previews/ (scroll all the way down)last week and had no issue updating software manager until now. I am getting this error:
W: GPG error: http://repository.spotify.com stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 082CCEDF94558F59
Anyone using spotify has this particular issue? I'd also like to understand why an issue like this has occured. Thank you.