can someone tell the exact problem in the formula
Looking at the error it seems that you have not created 'Unit Price %' line item in the REV04 Price Growth Rate Module.
Also check the second Lookup that you have applied, try to match it with the second screenshot that you have attached.
It will then work
Its REV04 and not REVO4. Kindly get a clarity whether it's 'Zero' or 'Alphabet O'
Don't copy paste the formula. Try to refer the line items
Attach the screenshot of the error, the line item that you have created in the module and the dimensions(blueprint view).