Tutorial extension drawers occasionally fail to load

[ssande-fwd]

Describe the bug We have a tutorial that depends on an extension. On rare occasions the drawers and text annotations for that extension fail to load.

A team member documented her experience with the attached screenshots. She had the bug and took a screenshot. Then she came back to it the next day on the same computer and browser and it worked. The reason one part is blacked out in the screenshots is because that annotation failed because of a syntax error, not the bug. The extension used was Forward-Education/pxt-solar

This has also been observed in our professional development sessions where everybody loads the same tutorial and 1 or 2 participants get this bug. Sometimes refreshing/clearing cache/re-opening a new tutorial fixes it, sometimes it doesn't. The extension used in those cases was climate-action-kits/pxt-fwd-edu.

To Reproduce Unfortunately the bug cannot be reliably reproduced.

Screenshots

[abchatra]

@ssande-fwd ask folks to open F12 and copy the error message. This will help us debug. It is also possible extensions have error in them which will cause it to not load.

[ssande-fwd]

Thank you. I have passed along the request.