$query->upload($file)

should be

$query->upload('upfile')

From perldoc CGI (my emphasis)

To be safe, use the upload() function (new in version 2.47). When called with the name of an upload field, upload() returns a filehandle, or undef if the parameter is not a valid filehandle.

In reply to Re: Yet another CGI Upload problem - not like the others! by adrianh
in thread Yet another CGI Upload problem - not like the others! by stuayres

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