I'm having some trouble using the EWWW IO Plugin. I've used it in the past with no problems, but on the website I'm currently working on, managed through GoDaddy, it's claiming that optipng is not installed. I do not believe I have access to the root to install, so how can I go about doing this? Is this a support ticket issue or what? I've only ever managed WP sites through WPEngine.
GoDaddy’s managed platform only support the free JPG compression (jpegtran). Disable PNG and GIF compression in the EWWW settings or You Can Use a compression API key which is paid service not free. Another consideration might be changing the image optimization plugin.