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Excel cannot open the file '.xlsx' because the file format or file extension is not valid - ⚠️SOLVED

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【2023】Excel cannot open the file because the file format or file extension is not valid| 6 Fixes

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Excel cannot open the file '.xlsx' because the file format or file extension is not valid - ⚠️SOLVED

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Excel cannot open the file '.xlsx' because the file format or file extension is not valid -⚠️SOLVED

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Fix Excel cannot open the file '.xlsx' because the file format or file extension is not valid

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Excel Cannot Open File Because The File Format Or File Extension Is Not Valid! | Excel Tech & Tricks

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FIX Excel Cannot Open The File Because The File Format Or File Extension Is Not Valid

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File Format and Extension don't Match in Excel File | The File Could be Corrupted or Unsafe

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Fix Excel Unknown Extension Problem | XLSX Not Opening