@_JB I have the exact same issue here. I am on a dev store by the way. here is the checkout URL: https://rlc-test-store.myshopify.com/checkouts/cn/c1-76db9e78f5053e72c51107caa116815e?ew_m=f.  The new carrier service I created is called RL Carrier Ser...

@xtramiledevsir, have you got the problem resolved? I have the exact same issue here. If you have a fix, please share. Thanks.