I have somehow created an error on my Magento online store and I need help!
This error started occuring after I added another Magento User, and although I have now deleted the additional user it has now fixed the problem. When I try and upload a product image it will either generate this error or it sometimes logged me out.
Looking around the web this seems to be a common problem without a simple fix, but I'm sure it would be quick and easy to do for someone with a good understanding on Magento, htaccess, etc..
Don't bid unless you are able to start work on this straight away.