Can’t upload files on PRO version

Good morning,

I’ve setted an upload form on my website, but I can’t manage the upload of files bigger than 5 MB.

I’ve edited my php.ini increasing max upload size, max_execution_time, max_input_time and memory_limit.

Main uploads are archives (.zip / .rar), and I’m able to upload them if they are smaller than 5 MB.

When I upload a file bigger than 5 MB it shows me this error:
Upload failed! Unknown error.
Failed upload path: sample upload 2017.zip
fileupload:0

Can you please let me know how to fix it?

Best regards!