Non-helpful error message when the fork of a PR has been deleted

[spoenemann]

Describe the bug

When you open a PR in Gitpod that was created from a fork, and the fork is deleted again, Gitpod displays

We are having trouble parsing your context
Error: Cannot read property ‘repository’ of null

Steps to reproduce

• Fork a repository
• Create a PR to the original repository
• Delete the fork
• Open the PR in Gitpod

Expected behavior

The error message should make clear that the repository does not exist.

Example repository

eclipse/openvsx#61

[jankeromnes]

I very much agree that this error message is super unhelpful.

Originally reported as #4

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[jankeromnes]

Now being tracked here: #3659