PossionGAM() doesn't show the EDoF and the p-value is 0 at all.

[NickAlexander18]

I'm a new one here. Hoping someone can help me.
As described in the picture, there's no value in 'EDoF' and 'p-value' and I don't understand what happend. I must missed something but I can't find out.

Thanks in advaced! :)