Information required to submit your build for external testing

I'm trying to submit an Independent Apple Watch app for Testflight external testing. I've able to do this pretty consistently until the latest build. Right after submitting the test information, I get the following error message from AppStoreConnect:


Sorry, something went wrong.

Some of the information required to submit your build for external testing is missing.


It appears to be getting a 422 error from "https://appstoreconnect.apple.com/iris/v1/betaAppReviewSubmissions":

{

"errors" : [ {

"id" : "3e2cd38c-9567-44c8-b243-20ca39c95cdc",

"status" : "422",

"code" : "ENTITY_UNPROCESSABLE.MISSING_REQUIRED_DATA",

"title" : "Missing required information to submit for external testing",

"detail" : "Missing requied data."

} ]

}


I have no indication what is missing from the build, this time to indicate what I need to add.

the description of

422
says:

The 422 (Unprocessable Entity) status code means the server understands the content type of the request entity (hence a 415 (Unsupported Media Type) status code is inappropriate), and the syntax of the request entity is correct (thus a 400 (Bad Request) status code is inappropriate) but was unable to process the contained instructions.

Information required to submit your build for external testing
 
 
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