James Kraus on "[Plugin: EWWW Image Optimizer] Bulk optimize does not work"

The bulk upload feature is displaying an empty screen for the site I'm working on. I'm using the cloud version right now, but the regular version didn't work either.

Setting shows all oks:

Cloud API Key: Verified, used 0 of 1000, usage will reset in 27 days.

Only need one of these: finfo: OK  getimagesize(): OK  mime_content_type(): OK

Debug log:

Debug Log

www-data
WP version: 3.8.1
EWWW IO version: 182
ewww_image_optimizer_admin_init()
ewww_image_optimizer_init()
ewww_image_optimizer_cloud_verify()
verification success via: 146.185.173.199
verification body contents: great
ewww_image_optimizer_disable_tools()
ewww_image_optimizer_options()
ewww_image_optimizer_cloud_verify()
verification success via: 192.241.202.158
verification body contents: great
ewww_image_optimizer_cloud_quota()
quota data retrieved: 1000 0 27
ewww_image_optimizer_jpeg_background()
ewww_image_optimizer_jpeg_background()
ewww_image_optimizer_jpg_quality()

And only this shows up in the logs:

[Mon Feb 24 16:52:39 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:52:42 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:52:42 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:52:42 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:52:42 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:52:42 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:52:43 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:52:43 2014] [debug] mod_deflate.c(615): [client 198.137.20.180] Zlib: Compressed 242871 to 63731 : URL /wp-admin/load-styles.php, referer: http://wpdev.domain.com/wp-admin/upload.php?page=ewww-image-optimizer-bulk
[Mon Feb 24 16:52:43 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:52:43 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:52:43 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:52:43 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:52:43 2014] [debug] mod_deflate.c(615): [client 198.137.20.180] Zlib: Compressed 1153 to 444 : URL /index.php, referer: http://wpdev.domain.com/wp-admin/upload.php?page=ewww-image-optimizer-bulk
[Mon Feb 24 16:52:46 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:53:14 2014] [debug] mod_deflate.c(615): [client 198.137.20.180] Zlib: Compressed 746891 to 163162 : URL /wp-admin/upload.php, referer: http://wpdev.domain.com/wp-admin/options-general.php?page=ewww-image-optimizer-cloud/ewww-image-optimizer-cloud.php
[Mon Feb 24 16:53:14 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:53:14 2014] [debug] mod_deflate.c(615): [client 198.137.20.180] Zlib: Compressed 172768 to 55623 : URL /wp-admin/load-scripts.php, referer: http://wpdev.domain.com/wp-admin/upload.php?page=ewww-image-optimizer-bulk
[Mon Feb 24 16:53:14 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:53:14 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:53:14 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:53:14 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:53:14 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:53:14 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:53:14 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:53:14 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:53:14 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:53:14 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:53:14 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:53:14 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()
[Mon Feb 24 16:53:14 2014] [debug] mod_headers.c(756): headers: ap_headers_output_filter()

https://wordpress.org/plugins/ewww-image-optimizer/