Summary

Some Confluence Cloud instances are unable to generate a backup as the operation is stuck and only displays a spinning wheel before showing an error message:

Export error
Export in progress - not responding
But don't worry, we'll fix it for you!
You just need to contact Atlassian support and paste in this error message, timestamp and your instance details.
Timestamp: 2017-09-19T11:52:59.491

Steps to Reproduce

1. Launch a backup generation

Expected Results

A backup generation is triggered and generates a backup of Confluence.

Actual Results

The backup operation is stuck at 0% and only displays an infinite spinning wheel before displaying the error message

Export error
Export in progress - not responding
But don't worry, we'll fix it for you!
You just need to contact Atlassian support and paste in this error message, timestamp and your instance details.
Timestamp: 2017-09-19T11:52:59.491

Workaround

None.

Notes

This is also impacting page PDF export and space export as XML and PDF.