Ok, I've checked the server logs and I can see ChipChop trying to activate the Alexa skill quite a few times and I've found one descriptive response from Alexa's server saying:
"Customer is not authorized to enable this skill"
As far as I am aware ChipChop's skill should be open worldwide and has 3 different Lambda's with Amazon in order to cover all regions.
I have a feeling this is something to do with the language coverage or some cross country restrictions and your local Alexa node is being an ass 😡☠️🚽
This is the first time I see that particular server though, I've got its name so I will roll up the sleeves and dig into it straight away...grrrr....stuff like this really pisses me off.
Can you just check one thing, in the Alexa app under skills & games if you search for "chipchop" does it bring the skill or says it's not found? If it's not found then it's a regional issue (i hope bloody not)
I'll look into is straight away and keep you posted