BUG: SAVE webpage COMPLETE - broken. Only a folder is created !

[AlanScot]

This webpage fails SAVE PAGE  as "webpage complete" only creates a folder https://community.appinventor.mit.edu/t/free-compcreator-create-component-dynamically/49724/251           no .htm nor .html file is created.

whereas this https://www.dmv.ca.gov/portal/senior-drivers/ works and this https://blog.khanacademy.org/free-science-activities-teachers/ works

[siffemcon]

Verified. You can file a compatibility issue

- via the 'Report broken site' option (https://support.mozilla.org/en-US/kb/report-breakage-due-blocking) (Send technical and interaction data to Mozilla must be enabled)

- on webcompat.com (https://webcompat.com/issues/new), esp. if you want to include a screenshot