Publishing to Apple News fails silently when there is an error

Problem/Motivation

When you publish to Apple News and there is an error, publishing to Apple News fails silently. The only indication that something went wrong is the error message is logged.

Steps to reproduce

• On local site
• Fully configure the module, with a template for articles that includes the Body field
• Create a new article with an image embedded in the body
• Save

Expected result

Error message is shown to the user that the embedded image (or other issue) is not currently supported

NOTE: For this particular example of a local image not able to send to Apple News, ideally the module would be able to handle this better and push the image somehow, hoever this is meant to implement the error fallback for when there isn't anything we can do and the user potentially can take action to fix the issue (for example remove an unsupported embed).

Proposed resolution

Show an error message to the user.

Remaining tasks

Implementation and tests.

User interface changes

Showing an error message to the user when publishing to Apple News fails.

API changes

None.

Data model changes

None.