Use Excelphp and tcpdf in project

Hi!
Recently my project reports produced through the excelphp now tried to implement TCPDF
without removing excelphp. Now when I try to produce the same reports in excelphp get this
message: "Excel can not open the file because the file formt file_name.xlsx or file extension
is not valid. The Verify that the file has not Been corrupted and the file extension matches the
format of the file "
Can i use Excelphp and tcpdf at the same time
can someone tell how can i fix the error

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