Description of problem:

When users select many repositories at once, for example 100 or more there is a general error message that gives not much of a value and doesn't help users with understanding the issue and how they can solve it.

Prerequisites (if any, like setup, operators/versions):

Steps to Reproduce

1. Open the Bulk Import plugin
2. Select many repositories from the Organization view using the side drawer
3. Click on the "Create pull requests"
4. View the error message appears

Actual results:

A generic "Failed to create pull request" error appears when trying to import many repositories at once (screenshot).

Expected results:

More user friendly message should appear to help users understand the issue and how to overcome it.

Reproducibility (Always/Intermittent/Only Once):

Build Details:

Additional info (Such as Logs, Screenshots, etc):

RHDH test day (row 40)