I used composer to download Spreadsheet, and then used Spreadsheet in the controller, but when I instantiated the Spreadsheet, I reported an error
Fatal error: Class 'PhpOffice\PhpSpreadsheet\Spreadsheet' not found
what is the reason? ?
The Spreadsheet was not found. Check to see if the imported path is wrong or it has not been downloaded.
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The Spreadsheet was not found. Check to see if the imported path is wrong or it has not been downloaded.