This is caused by the function NotificationBox.appendNotification() having been converted to async in mozilla-central 128 (Firefox' codebase)
Uncaught (in promise) TypeError: newNotification.messageImage is undefined
popupRestrictedFeature chrome://quickfolders/content/quickfolders-util.js:415
onSkipFolder chrome://quickfolders/content/quickfolders-interface.js:541
oncommand about:3pane:1
quickfolders-util.js:415:11
For example, when the user does something like "Skip unread folder", without a QF license, they get a notification such as the on shown below:

The QuickFolders icon should also be displayed on the left of the notification. It is also possible that a function doesn't fully execute after the exception is thrown.
This is caused by the function
NotificationBox.appendNotification()having been converted to async in mozilla-central 128 (Firefox' codebase)For example, when the user does something like "Skip unread folder", without a QF license, they get a notification such as the on shown below:
The QuickFolders icon should also be displayed on the left of the notification. It is also possible that a function doesn't fully execute after the exception is thrown.