pay: No signature found and invoice settings problems

First of all, thanks for such a wonderful gem. I’m integrating it for our SaaS project, and few things are not clear to me, or rather maybe could not figure out it from the docs.

I have started to test webhook integration with ngrok, and I’m getting this error when payload comes to the webhook endpoint.

No signatures found matching the expected signature for payload

As I can see on Google, people usually read the raw request body to validate properly.

The second problem is when I try to call the subscribe method, it says:

NoMethodError (undefined method `invoice_settings' for #<Stripe::Customer:0x00007fdf103c0a90>):

Subscriptions worked in the beginning (I could see them inside of Stripe dashboard properly) but now this exception happens.

Did anyone encounter similar issues?