error when uploading leads

Hi Guys,

first thanks for the good work, this CRM looks and feels awesome!

Now, after a quick and easy install, i think i’m in trouble with chmod…when uploading leads i got an error saying :

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

I’m changing chmod to 775 to the whole suitecrm files and folders right now…
If any of you encountered this error before, could you please be so kind and let me know how to fix it?

Thanks and best regards,