Could not make DefaultEngine.ini writable toast when changing Project Settings on Linux

A toast message appears when changing a Project Setting on the Linux machine stating:
Could not make /path/to/project's/DefaultEngine.ini writable

Despite message, the information is still written to the DefaultEngine.ini file

I do not see this issue on Windows.

1. Open UE4Editor
2. Create a new Flying BP project
3. Select Edit > Project Settings > Cooker
4. Check the Iterative cooking checkbox

RESULT:
A toast message appears stating that the DefaultEngine.ini could not be made writable