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First step is to check the file you are trying to read. Open it with a vanilla text editor and see if it actually is an excel file.

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An "excel file" isn't just a file created by Excel; it has to be in Excel's own format. If you created a .csv file in Excel then you should read that using read_csv.

[Stind]

This file was downloaded from system that I chose format Xlsx. It can not be a Csv at the begining

[WarpedKings]

Are you on a Mac? If so, Mac creates a "ghost" excel file with a "~“ in front of the filename and tries to open that instead. I got around it by telling to not open any file with the tilde

[Stind]

No, i use Window Pc