If I would send you a picture of the whole project would you see what the error is?
Please share the pictures
If you notice, issue is with Append Range activity. Most probably it’s issue of your data.
For example if your source range column is of Number datatype and your destination columns datatype if Decimal or something other than Number, you will get this error.
Check the data and datatype are same to Append range work. Alternatively you can use Copy/Paste Range activity.
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