[Bug]:

[SergioAraya]

Is the bug applicable and reproducable to the latest version of the package and hasn't it been reported before?

• Yes, it's still reproducable

What version of Laravel Excel are you using?

3.1.55

What version of Laravel are you using?

8.1.0

What version of PHP are you using?

8.1.29

Describe your issue

How can the issue be reproduced?

By generating a report

What should be the expected behaviour?

a working report

[MarkBaker]

Somewhere you are outputting two whitespaces before the file is generated, so they appear at the beginning of the filestream and are included in the file when it is saved

[SergioAraya]

The thing is that in dev it works fine.

maatwebsite/excel version: "3.1.55"

Dev:
php version: 8.1.29

Prod:
php version: 8.1.27

[MarkBaker]

So something is different between your dev and your prod. Those spaces are visible in the output you've shown, immediately before the 'PK' on that first line.