Wordpress LScache Plugin: wp-admin/admin-ajax.php 403
Last Updated on: Wed, 15 Apr 2026 00:00:02 Hello, We are using Convert Plus for our newsletter subscribers. The issue we have is that when someone tries to subscribe , after clicking the button nothing happens, and in the console we get a 403 error for the file wp-admin/admin-ajax.php. If we disable the LSCache plugin everything works well. As it seems the cache is causing the problem. Also we tested on a staging, disabling other problems one by one so we can see that there are not other conflicts. Everything works fine with all plugins, but when LSCache is enabled it doesnt anymore. Thanks! This topic was modified 2 years, 4 months ago by pelin201. The page I need help with: https://bibi-shoes.ro/sales/ Hi, This sounds like a typical nonce issue. Could you please reach Convert Plus author and kindly ask them the nonce names they use ? Best regards, Hello, as for now i am waiting for an answer from Convert Plus support team. Thank you for your response, will be back after i get an answer. Thanks! Hello, this is the answer i got from the Convert Plus team: Hello, When a subscriber gets added to the campaign, Convert Plus verifies the below nonce. if ( ! wp_verify_nonce( $_POST[_wpnonce], cp-submit-form- . $style_id ) ) wp_send_json_error() In the above code, the $style_id variable is different for every form. Example ? style_id: cp_id_420f1 _wpnonce: fb128911ac Does this help? Thanks! Hi, Yes, that is very much helpful. Now, please go to cache ?> ESI , enable ESI and then in the ESI nonce list , add cp-submit-form- into that list , save, purge all and see how it goes Best regards, Hello @CacheCrawler ! As we tested after putting cp-submit-form- in the nonce list everything works fine. Thank you very much for the help! Hello @CacheCrawler, Reopening this support thread because after one month the problem appeared again. No changes were made to the plugins. We get the same error even though the nonces are set in the ESI nonce list. Can you please give us a helping hand? Hi, may I know what is your current version ? Best regards, Hello, we are curently using 3.4.2. with wp 5.4.2 and woocommerce 4.2.2 Thanks Hi, if you downgraded to 3.4.1 , how does it go ? Best regards, Hi again, as it seems now everything is working just fine. Thanks for the help. Hi, Huh ? did you solve the issue ? Hello, yes downgrading to 3.4.1 resolved the issue, now everything is working as it should. Your solution worked. Thanks again! Hi, Yes well , but its just half of solution , we will need to figure out what happens on 3.4.2 and why it doesnt work Please create a ticket here , we will investigate it further Best regards, Hello, just created a ticket. Thanks!
LiteCache Rush: Speed comes from using less, not from doing it faster
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