Dictionary key Not Found and Other Errors

hello,

I was working on ACME Assignment one client security hash and always run into this dictionary key not found error. Read all the answers but couldn’t find a solution. I checked for correctness of key names, excel values, extra spaces etc. each time i run into a sightly different error. Following are the errors and screenshots

Errors
errors

"Arguments"

Excel Values

Also attaching the workflow for your reference. Appreciate your help

CalculateClientSecurityHash.zip (516.4 KB)

Thanks for Your Help
Hara