Title: Uncaught ValueError: Unknown format specifier “k” Last modified: March 5, 2024 --- # Uncaught ValueError: Unknown format specifier “k” * Resolved [Jos Klever](https://wordpress.org/support/users/josklever/) * (@josklever) * [2 years, 3 months ago](https://wordpress.org/support/topic/uncaught-valueerror-unknown-format-specifier-k/) * After updating the plugin from version 7.3.1 to 7.3.2 I’m getting the following fatal error breaking the site: * ```wp-block-code PHP Fatal error: Uncaught ValueError: Unknown format specifier "k" in /.../wp-content/plugins/wp-whatsapp-chat/vendor_packages/wp-notice-plugin-promote.php:79 Stack trace: #0 /.../wp-content/plugins/wp-whatsapp-chat/vendor_packages/wp-notice-plugin-promote.php(79): sprintf() #1 /.../wp-content/plugins/wp-whatsapp-chat/wp-whatsapp-chat.php(53): require_once('...') #2 /.../wp-settings.php(473): include_once('...') #3 /.../wp-config.php(101): require_once('...') #4 /.../wp-load.php(50): require_once('...') #5 /.../wp-blog-header.php(13): require_once('...') #6 /.../index.php(17): require('...') #7 {main} thrown in /.../wp-content/plugins/wp-whatsapp-chat/vendor_packages/wp-notice-plugin-promote.php on line 79 ``` Viewing 12 replies - 1 through 12 (of 12 total) * [TommyRocks](https://wordpress.org/support/users/tommyrocks/) * (@tommyrocks) * [2 years, 3 months ago](https://wordpress.org/support/topic/uncaught-valueerror-unknown-format-specifier-k/#post-17474804) * Hey Jos, We had the same issue. There is an easy hotfix. go to file wp-content/ plugins/wp-whatsapp-chat/vendor_packages/wp-notice-plugin-promote.php line 76. * There you see this line: Today we have a special gift for you. Use the coupon code %1$s within the next 48 hours to receive a 20% discount on the premium version of the %2$s plugin.Change it to this:Today we have a special gift for you. Use the coupon code %1$s within the next 48 hours to receive a 20\% discount on the premium version of the %2$s plugin.So add a \ after 20 to escape the %.Hope this helps you to.Regards,Omri de Hek * Thread Starter [Jos Klever](https://wordpress.org/support/users/josklever/) * (@josklever) * [2 years, 3 months ago](https://wordpress.org/support/topic/uncaught-valueerror-unknown-format-specifier-k/#post-17474838) * Thanks Omri, that seems to work indeed! 😃 * Now we’ll have to wait if it gets fixed in the next version soon. * [Supje](https://wordpress.org/support/users/supje/) * (@supje) * [2 years, 3 months ago](https://wordpress.org/support/topic/uncaught-valueerror-unknown-format-specifier-k/#post-17474890) * Same here. Fatal error after updating. The fix above solved this. - This reply was modified 2 years, 3 months ago by [Supje](https://wordpress.org/support/users/supje/). - This reply was modified 2 years, 3 months ago by [Supje](https://wordpress.org/support/users/supje/). * [LogoLogics](https://wordpress.org/support/users/logologics/) * (@logologics) * [2 years, 3 months ago](https://wordpress.org/support/topic/uncaught-valueerror-unknown-format-specifier-k/#post-17475042) * Same here, several sites all offline (critical error message) after the update to version 7.3.2. For now, I had to deactivate this plugin using FTP to get to the files, because it was impossible to log in to the sites.Hope they fix it soon in a next update. * [@tommyrocks](https://wordpress.org/support/users/tommyrocks/), the fix works, thanks! I simply removed the whole line “Use the coupon code %1$s within the next 48 hours to receive a 20% discount on the premium version of the %2$s plugin.”, that works too. - This reply was modified 2 years, 3 months ago by [LogoLogics](https://wordpress.org/support/users/logologics/). - This reply was modified 2 years, 3 months ago by [LogoLogics](https://wordpress.org/support/users/logologics/). * Plugin Author [quadlayers](https://wordpress.org/support/users/quadlayers/) * (@quadlayers) * [2 years, 3 months ago](https://wordpress.org/support/topic/uncaught-valueerror-unknown-format-specifier-k/#post-17476669) * Hello guys * We’re investigating this issue * What is your current PHP version? * Plugin Author [quadlayers](https://wordpress.org/support/users/quadlayers/) * (@quadlayers) * [2 years, 3 months ago](https://wordpress.org/support/topic/uncaught-valueerror-unknown-format-specifier-k/#post-17476768) * [@josklever](https://wordpress.org/support/users/josklever/) [@tommyrocks](https://wordpress.org/support/users/tommyrocks/) [@supje](https://wordpress.org/support/users/supje/) [@logologics](https://wordpress.org/support/users/logologics/) please test version 7.3.3 * Thread Starter [Jos Klever](https://wordpress.org/support/users/josklever/) * (@josklever) * [2 years, 3 months ago](https://wordpress.org/support/topic/uncaught-valueerror-unknown-format-specifier-k/#post-17477048) * When you were asking about the PHP version followed by “please test version 7.3.3”, it made me laugh first until I understood that you didn’t mean the PHP version but the updated plugin. * The site is running PHP 8.2 (also tested with 8.0). * The update to 7.3.3 broke the site again with the same error, so I had to apply the fix above again manually to fix the site. Why did you choose for a different solution without testing it? * Today my client decided to keep using this plugin, because a fix was given by another user. But if you keep breaking sites without listening to solutions provided by your users, we will switch to another plugin. * [LogoLogics](https://wordpress.org/support/users/logologics/) * (@logologics) * [2 years, 3 months ago](https://wordpress.org/support/topic/uncaught-valueerror-unknown-format-specifier-k/#post-17477113) * [@quadlayers](https://wordpress.org/support/users/quadlayers/), Thanks for the update, but I must confirm what Jos Klever says. the issue is still there in version 7.3.3.My sites are running on PHP version: 8.2.11**Removing this sentence in file wp-content/plugins/wp-whatsapp-chat/vendor_packages/wp-notice-plugin- promote.php line 76 fixes it again:**“Use the coupon code %1$s within the next 48 hours to receive a 20%% discount on the premium version of the %2$s plugin” So, it looks like that is the only thing that needed to be altered or removed in your update?Thanks,Annie * Plugin Author [quadlayers](https://wordpress.org/support/users/quadlayers/) * (@quadlayers) * [2 years, 3 months ago](https://wordpress.org/support/topic/uncaught-valueerror-unknown-format-specifier-k/#post-17477713) * [@josklever](https://wordpress.org/support/users/josklever/), we haven’t been able to reproduce the error either in our local environment or on our servers, so we are trying out solutions that we see from other developers. * [@logologics](https://wordpress.org/support/users/logologics/), thanks for sharing the fix. Indeed, the issue is related to how your server is parsing the ‘20%’ string inside the sprintf function. We’ve now moved the string outside, so it should be fixed. * [@tommyrocks](https://wordpress.org/support/users/tommyrocks/) @supje @logologics please test version 7.3.4 * Thread Starter [Jos Klever](https://wordpress.org/support/users/josklever/) * (@josklever) * [2 years, 3 months ago](https://wordpress.org/support/topic/uncaught-valueerror-unknown-format-specifier-k/#post-17478908) * Version 7.3.4 doesn’t give an error anymore. * [LogoLogics](https://wordpress.org/support/users/logologics/) * (@logologics) * [2 years, 3 months ago](https://wordpress.org/support/topic/uncaught-valueerror-unknown-format-specifier-k/#post-17479043) * [@quadlayers](https://wordpress.org/support/users/quadlayers/), Thanks, this works!Annie * Plugin Author [quadlayers](https://wordpress.org/support/users/quadlayers/) * (@quadlayers) * [2 years, 3 months ago](https://wordpress.org/support/topic/uncaught-valueerror-unknown-format-specifier-k/#post-17479087) * Great!!! Thanks for the update Viewing 12 replies - 1 through 12 (of 12 total) The topic ‘Uncaught ValueError: Unknown format specifier “k”’ is closed to new replies. * ![](https://ps.w.org/wp-whatsapp-chat/assets/icon-256x256.jpg?rev=3159330) * [Social Chat - Click To Chat App Button](https://wordpress.org/plugins/wp-whatsapp-chat/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-whatsapp-chat/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-whatsapp-chat/) * [Active Topics](https://wordpress.org/support/plugin/wp-whatsapp-chat/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-whatsapp-chat/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-whatsapp-chat/reviews/) * 16 replies * 5 participants * Last reply from: [quadlayers](https://wordpress.org/support/users/quadlayers/) * Last activity: [2 years, 3 months ago](https://wordpress.org/support/topic/uncaught-valueerror-unknown-format-specifier-k/#post-17479087) * Status: resolved