fix

app/Http/Services/DataService.php

@@ -873,6 +873,6 @@ class DataService
                 array_unshift($suppliersZhangQi, $header);
                 array_unshift($suppliersZhangQi, $header);
                 $sheet->fromArray($suppliersZhangQi);
                 $sheet->fromArray($suppliersZhangQi);
             });
             });
-        })->export('xlsx');
+        })->export('xls');
     }
     }
 }
 }
\ No newline at end of file