This error is coming whenever i tried to change data i want when cardview click points of user must decrease by 5 . here is my block
Remove make a list block in update row by number
And what is the result of get row id check it in notifier maybe your row number is also wrong
Block is not connectinh without make a list block
So change row number block to get cardview id .
Set cardview id in a variable and set it into update row number.
Because according to your blocks id is not a number so that’s why they cause error
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