What's with the weird PHPEXCEL error?

Question

PHP

I import data from the uploaded file. I get an error:
Fatal error: Uncaught exception 'PHPExcel_Exception' with message 'You tried to set a sheet active by the out of bounds index: 1.
BUT! if I open this file and resave it (without editing anything!) everything works as it should.
what the..**** ?
When Windows boots up, it disables potentially dangerous content. And after opening-resaving the file is considered "own" and does not cause errors. The question is how to make sure that the file does not have to be resaved

Answer 1

Well, translate the mistake.
You put active page 1, which is not. Try 0

Answer 2

The bottom line is that this file has 1 page. I wrote in the question that after resaving everything reads the SAME file. I think this oprationka messes up with security and blocks the content.