Adding draw.io diagram does not currently work in Confluence cloud.
STR:
1. Hit 'Create' > 'Blank Page'.
2. Hit '+' > 'View More' > 'Visuals & Images' > 'Draw.io Diagram'
EXPECTED RESULT:
Draw.io loads and I am able to create some nice looking and explanatory diagrams.
ACTUAL RESULT:
Never-ending Draw.io logo.