I’m having a similar issue. I’m trying to upload a custom logo to a theme and am getting an error:
Can’t upload! Directory … is not writable!
Change write permissions with CHMOD 755 or 777
I went into FileZilla and changed the permissions for the upload file and some others to 755 but that didn’t change anything. Does it matter that I used the auto-install? I’m access the site through a different host user name than the one that was there from the auto install. I don’t know the password for the auto install user name so I can’t use that. Just strange that I changed the permissions and nothing happened. Thanks for the help.