Lofesa commented on issue #1563: again the error: [ngx_pagespeed 1.13.35.2-0] PageSpeed Serf fetch failure rate extremely high; only 0 of 44 recent fetches fully successful; is fetching working? URL: https://github.com/apache/incubator-pagespeed-ngx/issues/1563#issuecomment-393108677 Request headers don´t matter. The ones that ae relevant are the response headers. In the last image you posted, the slide5.png had a valid cache-control : max-age=10800..... but looking in that mage I don´t see any header that sugest the image become optimized by pagespeed, headers like etag: W/"0" , or x-page-speed: 1.13.35.2-0.... Can you post here or send in a private mail a url from your site so I can test it?
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