gpg: verify signatures failed: Unexpected error

I’ve donwloaded diaspora form github and there is only fingerprint at the bottom of the page and if you click it whole key block will appear. So I copy all the key block paste it in to kwrite ande save it as but when I did Code:
gpg --verify
gpg says unexpected error. When I import key form that .sig file it list that pubkey just fine. Why would then the verifying fail?

There is a double post about this here:

I assume that is the better one. This is CLOSED and will be deleted.