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Thomas HThomas H 

Record Update element 'Update Discount Field' isn't properly configured

I am stuck here too. Suggestions ?   I have read this whole thread and the attachments. A great resource. 

The Flow seems to be functioning? The Discount Button works fine in the drop down ) 

The Lightning Page Layout is not displaying Discount Amount ? Discount Percent and Discount Percentage are fine. 

I spent wayyyy tooo much time on this Trail; but I do like the Flow functionality !        

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AbhishekAbhishek (Salesforce Developers) 
For all the Trailhead issues please report it here,

https://trailhead.salesforce.com/help?support=home#

https://trailhead.salesforce.com/help

So that our trailhead support engineers will look into it and get back to you.

I hope you find the above information is helpful. If it does, please mark as Best Answer to help others too.

Regards,
Salesforce Support.
Bowen XiaoBowen Xiao
i was the same problem.

the right name is  Update Discount Field 
there is no 's' in Field