Server Error Adding Shipping to Draft Order

[LibertyJason]

Hello, I cannot add shipping to a draft order, I get a little red box that says server error. I tried to duplicate the order and add shipping, but that one would not allow it either. I need this fixed immediately. 

[Eric-HAN]

Hi, there 

If your shipping methods are sourced from a third-party app or service, you may need to contact the provider of that service for assistance and support.