Why i am getting this error? The operation cannot accept the arguments *empty string*

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#1

hey everyone,
i am getting a error from 4-6 days.
i am unable to solve this .

so, i posted in community.

here is the error.

Screenshot (92)
Screenshot (92)1366×768 100 KB

please help me to solve this

#2

can you show Blocks related to

SetNumberofStars

#3

Probably you request some empty list or you try to set a variable with an empty string (text, number, etc)

#4