Read Range: The sheet workflow does not exist in workbook C:\Users\Administrator\Documents\UiPath\trycatch\Practice1.xlsx.
Could you please check whether you have used the correct sheet name in the read range activity. in my first glance on your question i could understood this much. if still not working please elaborate issue with screenshot and some issue information about your process. thanks.
Usually when you use Read Range by default the sheet name is Sheet1
If that is different then you have to give the appropriate name
Hope this may help you