Unable to backup a new project

[Toby Clark]

For an assessment, I have been required to import a pre-existing Jira file, however, when I attempt to backup (the brand new) Jira project (because it says I have to, to import any new files) it gives me the error: Export Error, Export Failed (Preparation).

Im new to Jira so not sure why its happening or how to fix it - I did a brief search for community posts and couldn't find anything answering the question so sorry if it has been answered/is a dumb question.