The only think I can think of offhand is what version of Skuid are you trying to connect to? Older versions of Banzai don’t have the Skuid Page API.
I was missing this:
'nforceOptions': {<br> 'environment': 'sandbox'<br> }
I’m facing the same issue while doing grunt skuid-push. I have Skuid Dubai version 15.0.12 installed in my org, but it’s not allowing me to push pages using grunt skuid-push command. I get this error “Fatal error: invalid_grant - authentication failure”. Any settings recently added to be modified?
Enabling this setting resolved the issue