Im having this issue issue with same sort of error, the plugin says ALL CLEAR in the check, i have enabled debug on output and this is what im getting, any ideas ?
thefarmfoods
EWWW IO version: 241.0
WP version: 4.2.2
ewww_image_optimizer_preinit()
ewww_image_optimizer_admin_init()
ewww_image_optimizer_init()
ewww_image_optimizer_cloud_init()
ewww_image_optimizer_exec_init()
no admin, be quiet
ewww_image_optimizer_resize_from_meta_data()
attachment id: 4847
this image already has metadata, so it is not new
ewww_image_optimizer_attachment_path()
WP thinks the file is at: /home/thefarmfoods/public_html/wp-content/uploads/2015/05/bg-tile-large.jpg
retrieved file path: /home/thefarmfoods/public_html/wp-content/uploads/2015/05/bg-tile-large.jpg
ewww_image_optimizer()
permissions: 0644, owner: thefarmfoods, group: thefarmfoods
ewww_image_optimizer_mimetype()
testing mimetype: /home/thefarmfoods/public_html/wp-content/uploads/2015/05/bg-tile-large.jpg
getimagesize: image/jpeg
ewww_image_optimizer_tool_found()
testing case: n at nice
tool not found
ewww_image_optimizer_tool_found()
testing case: n at /usr/bin/nice
tool not found
ewww_image_optimizer_tool_found()
testing case: n at /usr/local/bin/nice
tool not found
ewww_image_optimizer_tool_found()
testing case: n at /usr/gnu/bin/nice
tool not found
ewww_image_optimizer_tool_found()
testing case: n at /usr/syno/bin/nice
tool not found
original filesize: 182294
ewww_image_optimizer_path_check()
found /home/thefarmfoods/public_html/wp-content/ewww/jpegtran, testing…
ewww_image_optimizer_md5check()
/home/thefarmfoods/public_html/wp-content/ewww/jpegtran: 47c39feae0712f2996c61e5ae639b706
md5sum verified, binary is intact
ewww_image_optimizer_mimetype()
testing mimetype: /home/thefarmfoods/public_html/wp-content/ewww/jpegtran
ewww_image_optimizer_tool_found()
testing case: f at file
tool not found
ewww_image_optimizer_tool_found()
testing case: f at /usr/bin/file
tool not found
ewww_image_optimizer_tool_found()
testing case: f at /usr/local/bin/file
tool not found
ewww_image_optimizer_tool_found()
testing case: f at /usr/gnu/bin/file
tool not found
ewww_image_optimizer_tool_found()
testing case: f at /usr/syno/bin/file
tool not found
found /home/thefarmfoods/public_html/wp-content/ewww/jpegtran-alt, testing…
ewww_image_optimizer_mimetype()
testing mimetype: /home/thefarmfoods/public_html/wp-content/ewww/jpegtran-alt
ewww_image_optimizer_tool_found()
testing case: f at file
tool not found
ewww_image_optimizer_tool_found()
testing case: f at /usr/bin/file
tool not found
ewww_image_optimizer_tool_found()
testing case: f at /usr/local/bin/file
tool not found
ewww_image_optimizer_tool_found()
testing case: f at /usr/gnu/bin/file
tool not found
ewww_image_optimizer_tool_found()
testing case: f at /usr/syno/bin/file
tool not found
ewww_image_optimizer_tool_found()
testing case: j at jpegtran
tool not found
ewww_image_optimizer_tool_found()
testing case: j at /usr/bin/jpegtran
tool not found
ewww_image_optimizer_tool_found()
testing case: j at /usr/local/bin/jpegtran
tool not found
ewww_image_optimizer_tool_found()
testing case: j at /usr/gnu/bin/jpegtran
tool not found
ewww_image_optimizer_tool_found()
testing case: j at /usr/syno/bin/jpegtran
tool not found
ewww_image_optimizer_webp_create()
disabled sizes:
processing resizes
processing size: thumbnail
ewww_image_optimizer()
permissions: 0644, owner: thefarmfoods, group: thefarmfoods
ewww_image_optimizer_mimetype()
testing mimetype: /home/thefarmfoods/public_html/wp-content/uploads/2015/05/bg-tile-large-200×200.jpg
getimagesize: image/jpeg