Checkout API's 405 Method Not Allowed
Expected behavior
Checkout API for updating shipping address/shipping option should work when running theme locally
Actual behavior
It return 405 Method Not Allowed
Steps to reproduce behavior
stencil start sign in add to cart navigate to checkout choose shipping address/choose shipping option
Environment
Stencil-cli version stencil --version:
3.10.0
Node version node -v:
v12.22.10
NPM version npm -v:
6.14.16
OS:
wsl

I have exactly the same problem At the same endpoint And reproducing the behavior in the same way
Environment
Stencil-cli version stencil --version: 3.6.3
Node version node -v: v12.21.0
NPM version npm -v: 7.6.0
OS: macOS 11.6.2 (BuildVersion: 20G314)
I also replicated this issue and resolved by switching to Node 14 and re-installing Stencil CLI via the following:
npm install -g @bigcommerce/stencil-cli