Twilio says I don't have permission to send to the region of my 'To' number

Question

I am trying to send a simple SMS and have been doing so for over a year with my app. All of a sudden, on my staging and local environment (prod is fine), I keep getting this err

Answer 1

So...turns out that after creating the Twilio number and activating everything. You have to come here, to pick the nations you want to text to.