Draw.io diagrams not loading on Confluence pages

Issue Summary

It is not possible to see Draw.io diagrams on Confluence pages after inserting the file.

Steps to Reproduce

1. Create a page;
2. Insert any Draw.io diagram in this page - it won't even load after inserting it;
3. Publish the page

Expected Results

The Draw.io diagram is shown in the page's body.

Actual Results

Only a spinner wheel keeps spinning forever and the diagram is not shown.

Notes

• No network error in the browser's console is shown

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available