Cannot read properties of undefined (reading 'openmct')

[ghost]

Summary

When using the "Import From JSON" action, validation throws an uncaught error if an improperly formatted/non-JSON text file is selected.

Expected vs Current Behavior

Expected: An error notification should appear in the UI like in this image below.

Actual: No error notification appears.

Steps to Reproduce

1. From the action menu, click "Import From JSON"
2. In the Import From JSON pop-up dialog, select a non-JSON text file
3. A red X should now appear next to the select-file button.
4. Close the import dialog. There's no error notification.

Environment

• Open MCT Version: 4.1.0-next
• Deployment Type: np m dev
• OS: Ubuntu 22.04
• Browser: Firefox 134.0 64-bit, Chromium 131.0.6778.264, Brave 1.73.105

Impact Check List

• [ ] Data loss or misrepresented data?
• [ ] Regression? Did this used to work or has it always been broken?
• [ ] Is there a workaround available?
• [ ] Does this impact a critical component?
• [X] Is this just a visual bug with no functional impact?
• [ ] Does this block the execution of e2e tests?
• [ ] Does this have an impact on Performance?

Additional Information

[ghost]

Code update complete. Opening PR soon.....

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Associated PR: https://github.com/nasa/openmct/pull/7984