Hello,

Please check server requirements in documentation.pdf if those are fine, please let me know your version number and that you don't have modified the item.

You can check server error logs and let me know the error details too.

Thanks

Everything was fine on the server except for downloading pdf, csv and xlsx files and only happens on my lamp server other server are perfectly working

I can't guess, might be some config issue, you can check error logs for more info.