Facing issue with import tool

i am not able to import the file from excel sheet on the erp next there is showing the ( page data import not found) need to resolve the problem. please help me out this ASAP

I had this problem once…(long ago on like v10) - the problem in my case was that I had the xlsx file open while trying to import it.
I have since changed to using .CSV for imports and found it much more reliable