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Henk de Glint1Henk de Glint1 

Not able to mark trailhead module as "Read" - Creating and Customizing Lightning Apps

It is not possible to mark the trailhead module "Creating and Customizing Lightning Apps" as "read". There is no challenge required, and it says "This unit doesn't have a challenge. You can still earn points by marking the unit as read. Good job!". So, to complete the module, it must be marked as read. I am logged in, and still unable to mark as "read". What am I missing?
Cheers,
Henk
Gordon EngelGordon Engel
This question is getting asked a lot, but there's no answer yet.  I am following up with the Trailhead team.

https://developer.salesforce.com/forums?id=9060G000000XdHHQA0
Chris DuarteChris Duarte
Hi Henk - sorry for the trouble. This unit is currently missing the associated challenge, and we'll need to make a fix before you can complete the module. We're targeting 11/1 for the fix. Please hold off on this module until then. My apologies again for the inconvenience. 
Gordon EngelGordon Engel
The issue is now resolved.  We're sorry for the inconvenience.  Please try the Trailhead Unit again.