Wordpress LScache Plugin: Critical CSS generation queue stopped due to 404 error
Last Updated on: Wed, 15 Apr 2026 00:00:02 Guys, I must say the plugin is awesome. Heres a minor bug. The Critical CSS generation stopped due to the url https://advocate.sandeep-prakash.com/wp-content which is non-existent 404 --------------- URL list in queue waiting for cron https://advocate.sandeep-prakash.com/wp-content https://advocate.sandeep-prakash.com/category/techno-legal https://advocate.sandeep-prakash.com https://advocate.sandeep-prakash.com/techno-legal-blog https://advocate.sandeep-prakash.com/is-escort-service-legal-in-india --------- Debug Log (IP masked) --------- 07/10/19 03:07:07.074 [X.X.X.X:X 2 xiW] [Router] get_uid: 1 07/10/19 03:07:07.074 [X.X.X.X:X 2 xiW] [Router] get_role: administrator 07/10/19 03:07:07.074 [X.X.X.X:X 2 xiW] [Core] bypass_optm: hit Role Excludes setting: administrator 07/10/19 03:07:07.074 [X.X.X.X:X 2 xiW] [Router] LSCWP_CTRL: css 07/10/19 03:07:07.075 [X.X.X.X:X 2 xiW] [Router] LSCWP_CTRL verified: css 07/10/19 03:07:07.075 [X.X.X.X:X 2 xiW] [Router] parsed type: generate_critical 07/10/19 03:07:07.075 [X.X.X.X:X 2 xiW] [CSS] cron job [type] 404 [url] https://advocate.sandeep-prakash.com/wp-content [UA] Mozilla/5.0 (compatible MJ12bot/v1.4.8 http://mj12bot.com/) 07/10/19 03:07:07.077 [X.X.X.X:X 2 xiW] [CSS] Generating: --- array ( home_url => https://advocate.sandeep-prakash.com, url => https://advocate.sandeep-prakash.com/wp-content, ccss_type => 404, user_agent => Mozilla/5.0 (compatible MJ12bot/v1.4.8 http://mj12bot.com/), is_mobile => 0, ) 07/10/19 03:07:07.078 [X.X.X.X:X 2 xiW] [IAPI] posting to : https://as.wp.api.litespeedtech.com/ccss Expand 404 should be fine. What is the log after [IAPI] posting to : https://as.wp.api.litespeedtech.com/ccss? Thank you for the quick reply. Front-end I still see that the queue was generated on 3rd July -------------------------------------------------------------- Automatically generate critical CSS in the background via a cron-based queue. If set to OFF this is done in the foreground, which may slow down page load. Learn More Last generated: 07/03/2019 09:12:05 Last requested cost: 7s URL list in queue waiting for cron https://advocate.sandeep-prakash.com/wp-content https://advocate.sandeep-prakash.com/category/techno-legal https://advocate.sandeep-prakash.com https://advocate.sandeep-prakash.com/techno-legal-blog https://advocate.sandeep-prakash.com/is-escort-service-legal-in-india Run Queue Manually ------------------------------------- Here is the complete debug.log when I click Run Queue Manually button --------------------------------- 07/10/19 11:06:03.472 [X.X.X.X:X 2 A6N] 07/10/19 11:06:03.472 [X.X.X.X:X 2 A6N] Query String: page=lscache-settings&LSCWP_CTRL=css&LSCWP_NONCE=7dd151d90a&type=generate_critical 07/10/19 11:06:03.472 [X.X.X.X:X 2 A6N] HTTP_REFERER: https://advocate.sandeep-prakash.com/wp-admin/admin.php?page=lscache-settings 07/10/19 11:06:03.472 [X.X.X.X:X 2 A6N] Cookie _lscache_vary: admin_bar:1 logged-in:1 role:99 07/10/19 11:06:03.648 [X.X.X.X:X 2 A6N] [Ctrl] X Cache_control -> private ( logged in user ) 07/10/19 11:06:03.976 [Y.Y.Y.Y:Y 2 GFg] 07/10/19 11:06:03.976 [Y.Y.Y.Y:Y 2 GFg] Query String: doing_wp_cron=1562736963.7327690124511718750000 07/10/19 11:06:03.976 [Y.Y.Y.Y:Y 2 GFg] HTTP_REFERER: https://advocate.sandeep-prakash.com/wp-cron.php?doing_wp_cron=1562736963.7327690124511718750000 07/10/19 11:06:04.187 [Y.Y.Y.Y:Y 2 GFg] [Router] get_uid: 0 07/10/19 11:06:04.187 [Y.Y.Y.Y:Y 2 GFg] [Router] get_role: 07/10/19 11:06:04.192 [Y.Y.Y.Y:Y 2 GFg] GUI init 07/10/19 11:06:04.236 [Y.Y.Y.Y:Y 2 GFg] [Ctrl] not cacheable before ctrl finalize 07/10/19 11:06:04.236 [Y.Y.Y.Y:Y 2 GFg] [Router] get_role: 07/10/19 11:06:04.236 [Y.Y.Y.Y:Y 2 GFg] [Vary] role id: failed, guest 07/10/19 11:06:04.236 [Y.Y.Y.Y:Y 2 GFg] [Router] get_role: 07/10/19 11:06:04.236 [Y.Y.Y.Y:Y 2 GFg] [Router] get_role: 07/10/19 11:06:04.236 [Y.Y.Y.Y:Y 2 GFg] [Optm] bypass: Not frontend HTML type 07/10/19 11:06:04.237 [Y.Y.Y.Y:Y 2 GFg] End response -------------------------------------------------------------------------------- 07/10/19 11:06:04.261 [X.X.X.X:X 2 A6N] [Router] get_uid: 1 07/10/19 11:06:04.262 [X.X.X.X:X 2 A6N] [Router] get_role: administrator 07/10/19 11:06:04.262 [X.X.X.X:X 2 A6N] [Core] bypass_optm: hit Role Excludes setting: administrator 07/10/19 11:06:04.262 [X.X.X.X:X 2 A6N] [Router] LSCWP_CTRL: css 07/10/19 11:06:04.262 [X.X.X.X:X 2 A6N] [Router] LSCWP_CTRL verified: css 07/10/19 11:06:04.262 [X.X.X.X:X 2 A6N] [Router] parsed type: generate_critical 07/10/19 11:06:04.262 [X.X.X.X:X 2 A6N] [CSS] cron job [type] 404 [url] https://advocate.sandeep-prakash.com/wp-content [UA] Mozilla/5.0 (compatible MJ12bot/v1.4.8 http://mj12bot.com/) 07/10/19 11:06:04.264 [X.X.X.X:X 2 A6N] [CSS] Generating: --- array ( home_url => https://advocate.sandeep-prakash.com, url => https://advocate.sandeep-prakash.com/wp-content, ccss_type => 404, user_agent => Mozilla/5.0 (compatible MJ12bot/v1.4.8 http://mj12bot.com/), is_mobile => 0, ) 07/10/19 11:06:04.265 [X.X.X.X:X 2 A6N] [IAPI] posting to : https://as.wp.api.litespeedtech.com/ccss 07/10/19 11:06:04.563 [X.X.X.X:X 2 A6N] [IAPI] failed to decode post json: Too many requests sent 07/10/19 11:06:04.567 [X.X.X.X:X 2 A6N] [CSS] empty ccss 07/10/19 11:06:04.567 [X.X.X.X:X 2 A6N] [CSS] cron job [type] category [url] https://advocate.sandeep-prakash.com/category/techno-legal [UA] Mozilla/5.0 (X11 Ubuntu Linux x86_64 rv:67.0) Gecko/20100101 Firefox/67.0 07/10/19 11:06:04.568 [X.X.X.X:X 2 A6N] [CSS] Generating: --- array ( home_url => https://advocate.sandeep-prakash.com, url => https://advocate.sandeep-prakash.com/category/techno-legal, ccss_type => category, user_agent => Mozilla/5.0 (X11 Ubuntu Linux x86_64 rv:67.0) Gecko/20100101 Firefox/67.0, is_mobile => 0, ) 07/10/19 11:06:04.568 [X.X.X.X:X 2 A6N] [IAPI] posting to : https://as.wp.api.litespeedtech.com/ccss 07/10/19 11:06:04.857 [X.X.X.X:X 2 A6N] [IAPI] failed to decode post json: Too many requests sent 07/10/19 11:06:04.859 [X.X.X.X:X 2 A6N] [CSS] empty ccss 07/10/19 11:06:04.859 [X.X.X.X:X 2 A6N] [CSS] cron job [type] front [url] https://advocate.sandeep-prakash.com [UA] Mozilla/5.0 (Linux Android 6.0.1 Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.96 Mobile Safari/537.36 (compatible Googlebot/2.1 +http://www.google.com/bot.html) 07/10/19 11:06:04.859 [X.X.X.X:X 2 A6N] [CSS] Generating: --- array ( home_url => https://advocate.sandeep-prakash.com, url => https://advocate.sandeep-prakash.com, ccss_type => front, user_agent => Mozilla/5.0 (Linux Android 6.0.1 Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.96 Mobile Safari/537.36 (compatible Googlebot/2.1 +http://www.google.com/bot.html), is_mobile => 0, ) 07/10/19 11:06:04.860 [X.X.X.X:X 2 A6N] [IAPI] posting to : https://as.wp.api.litespeedtech.com/ccss 07/10/19 11:06:05.183 [X.X.X.X:X 2 A6N] [IAPI] failed to decode post json: Too many requests sent 07/10/19 11:06:05.184 [X.X.X.X:X 2 A6N] [CSS] empty ccss 07/10/19 11:06:05.184 [X.X.X.X:X 2 A6N] [CSS] cron job [type] page [url] https://advocate.sandeep-prakash.com/techno-legal-blog [UA] Mozilla/5.0 (X11 Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/75.0.3770.90 Chrome/75.0.3770.90 Safari/537.36 07/10/19 11:06:05.185 [X.X.X.X:X 2 A6N] [CSS] Generating: --- array ( home_url => https://advocate.sandeep-prakash.com, url => https://advocate.sandeep-prakash.com/techno-legal-blog, ccss_type => page, user_agent => Mozilla/5.0 (X11 Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/75.0.3770.90 Chrome/75.0.3770.90 Safari/537.36, is_mobile => 0, ) 07/10/19 11:06:05.186 [X.X.X.X:X 2 A6N] [IAPI] posting to : https://as.wp.api.litespeedtech.com/ccss 07/10/19 11:06:05.497 [X.X.X.X:X 2 A6N] [IAPI] failed to decode post json: Too many requests sent 07/10/19 11:06:05.499 [X.X.X.X:X 2 A6N] [CSS] empty ccss 07/10/19 11:06:05.499 [X.X.X.X:X 2 A6N] [CSS] cron job [type] post [url] https://advocate.sandeep-prakash.com/is-escort-service-legal-in-india [UA] Mozilla/5.0 (X11 Ubuntu Linux x86_64 rv:67.0) Gecko/20100101 Firefox/67.0 07/10/19 11:06:05.499 [X.X.X.X:X 2 A6N] [CSS] Generating: --- array ( home_url => https://advocate.sandeep-prakash.com, url => https://advocate.sandeep-prakash.com/is-escort-service-legal-in-india, ccss_type => post, user_agent => Mozilla/5.0 (X11 Ubuntu Linux x86_64 rv:67.0) Gecko/20100101 Firefox/67.0, is_mobile => 0, ) 07/10/19 11:06:05.500 [X.X.X.X:X 2 A6N] [IAPI] posting to : https://as.wp.api.litespeedtech.com/ccss 07/10/19 11:06:05.809 [X.X.X.X:X 2 A6N] [IAPI] failed to decode post json: Too many requests sent 07/10/19 11:06:05.810 [X.X.X.X:X 2 A6N] [CSS] empty ccss 07/10/19 11:06:05.812 [X.X.X.X:X 2 A6N] [Ctrl] not cacheable before ctrl finalize 07/10/19 11:06:05.812 [X.X.X.X:X 2 A6N] End response -------------------------------------------------------------------------------- 07/10/19 11:06:06.059 [X.X.X.X:X 2 rhb] ------GET HTTP/2.0 (HTTPS) /wp-admin/admin.php 07/10/19 11:06:06.059 [X.X.X.X:X 2 rhb] Query String: page=lscache-settings&type=generate_critical 07/10/19 11:06:06.059 [X.X.X.X:X 2 rhb] HTTP_REFERER: https://advocate.sandeep-prakash.com/wp-admin/admin.php?page=lscache-settings 07/10/19 11:06:06.059 [X.X.X.X:X 2 rhb] Cookie _lscache_vary: admin_bar:1 logged-in:1 role:99 07/10/19 11:06:06.232 [X.X.X.X:X 2 rhb] [Ctrl] X Cache_control -> private ( logged in user ) 07/10/19 11:06:06.325 [X.X.X.X:X 2 rhb] [Router] get_uid: 1 07/10/19 11:06:06.325 [X.X.X.X:X 2 rhb] [Router] get_role: administrator 07/10/19 11:06:06.325 [X.X.X.X:X 2 rhb] [Core] bypass_optm: hit Role Excludes setting: administrator 07/10/19 11:06:06.397 [X.X.X.X:X 2 rhb] [Ctrl] X Cache_control -> no Cache ( Admin page ) 07/10/19 11:06:06.446 [X.X.X.X:X 2 rhb] [Ctrl] not cacheable before ctrl finalize 07/10/19 11:06:06.446 [X.X.X.X:X 2 rhb] End response -------------------------------------------------------------------------------- Expand I also get this error in the front end Failed to post via WordPress: Too many requests sent I have raised a ticket in your support portal as I wanted to attach screenshot When you meet Too many requests sent error, you may need to wait a while to try another one. Its not related to 404 itself. As indicated in log, 404 can still be generated as a special type ccss_type => 404 What you say is right. But if you see this, its been waiting since 3rd July, i.e. since 7 days. If I am right, the cron job keeps appending to the queue. So even if I press the Manually Generate Critical CSS, since the queue is big, it gives that error message. Can you please tell me where (or in which table) is the url queue stored, so that I can clear it. ????????????????????? Automatically generate critical CSS in the background via a cron-based queue. If set to OFF this is done in the foreground, which may slow down page load. Learn More Last generated: 07/03/2019 09:12:05 Last requested cost: 7s URL list in queue waiting for cron When you clear CCSS cache, that queue will be cleared also. Currently there is a max 10 requests limit per 300s. This reply was modified 3 years, 4 months ago by Hai Zheng. Ok. But upon clearing the cache (Purge All) I still see the URL list in the queue and with the last run time stamp as below ?????- Automatically generate critical CSS in the background via a cron-based queue. If set to OFF this is done in the foreground, which may slow down page load. Learn More Last generated: 07/03/2019 09:12:05 Last requested cost: 7s URL list in queue waiting for cron Purge All currently wont purge CCSS. Please try the Purge CCSS link. Ok. I dont see the Purge CCSS link. Thats why I thought Critical CSS is not generated and the queue is blocked by 404. Let me know if I need to do something in the back-end in the cache or uploads folder. BTW I am running WordPress Multisite, and here are the options I see in the admin top bar of one of the sub-domain sites: Manage Settings Image Optimisation Purge All Purge All ? LS Cache Purge All ? CSS/JS Cache Report number: OJIHPHAU Report date: 07/10/2019 17:14:42 Those are my cache options I am now getting the Purge CCSS option after I toggeld back and forth the Generate CCSS option. Thank You LiteSpeed Team. You can close this ticket as resolved.
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