Hello
Preface:
I am attempting to migrate a project from our production Jira instance to a sandbox in our testing instance.
The migration successfully moved all users and groups, but fails with the project at 30% of the project data.

This behaviour is consistent between migration attempts.
Issue:
The error log I can download has no file name extension, and I can't seem to figure out what I should use to read it.
Notepad shows this:

Questions:
Am I doing something wrong?
Do I need a special program to open these logs?
Is it a bug I should contact Atlassian support about?