Thread:Project:Support desk/Cannot upload files

When attempting to upload a file, I get the message

I have followed the Manual:Configuring file uploads and verified that  is correctly configured, I have verified directory ownership and attributes to be correct (  and  ), in   I have   and   and I verified my user is an editor. I have verified the file type is allowed with the following entry  (I have nginx set to read these types as plain text in the   directory, so not a security issue).

What am I missing?