Can't upload files correctly

[elasri1]

Hi,
My problem is that I can't upload files from a site form
this is happening across all my accounts, and on multiple browsers/devices
- Removed -
this shows up (in firefox) when I (or any site member for that matter) try to upload a file to the site (let's say for example: adding a plugin in wordpress)
Uploading in Cpanel sounds to work fine, also the problem doesn't accure when uploading small files, it sounds to appear only with files > 10 Mo
things I have tried:
*) php.ini infos are as usuall in all accounts
*) tried disabling my server firewall
any ideas? please take in consideration that I'm not very experienced

 

[nixuser]

What is the error message you have received? Did you check the memory and upload size parameters in php?

 

[elasri1]

this is the error message that shows up in the browser
if you mean php.ini, then yes, I checked in every account, max memory and upload size are set to high values, I also tried to increase them more but that didn't help

 

[cPanelLauren]

Do you have php error logging enabled? If so can you tell us if there's a specific error output in the php error logs for this or what is output in the apache error logs when attempting to upload a file. You can find apache logs at /etc/apache2/logs/error_log