Title: Fatal Error Spark Post Last modified: December 9, 2021 --- # Fatal Error Spark Post * Resolved [moritz0grammer](https://wordpress.org/support/users/moritz0grammer/) * (@moritz0grammer) * [4 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-spark-post/) * Hello I have a Problem with all plugin related sites. If I open for example the WP SMTP Settings page I get following fatal Error: Uncaught ValueError: Unknown format specifier ” ” in /data/web/e129695/html/wp1/wp-content/plugins/wp-mail- smtp/src/Providers/SparkPost/Options.php:44 Stack trace: #0 /data/web/e129695/ html/wp1/wp-content/plugins/wp-mail-smtp/src/Providers/SparkPost/Options.php( 44): sprintf() #1 /data/web/e129695/html/wp1/wp-content/plugins/wp-mail-smtp/ src/Providers/Loader.php(199): WPMailSMTP\Providers\SparkPost\Options->__construct()# 2 /data/web/e129695/html/wp1/wp-content/plugins/wp-mail-smtp/src/Providers/Loader. php(102): WPMailSMTP\Providers\Loader->get_entity() #3 /data/web/e129695/html/ wp1/wp-content/plugins/wp-mail-smtp/src/Providers/Loader.php(223): WPMailSMTP\ Providers\Loader->get_options() #4 /data/web/e129695/html/wp1/wp-content/plugins/ wp-mail-smtp/src/Admin/Area.php(473): WPMailSMTP\Providers\Loader->get_supports_all()# 5 /data/web/e129695/html/wp1/wp-includes/class-wp-hook.php(303): WPMailSMTP\Admin\ Area->enqueue_assets() #6 /data/web/e129695/html/wp1/wp-includes/class-wp-hook. php(327): WP_Hook->apply_filters() #7 /data/web/e129695/html/wp1/wp-includes/ plugin.php(470): WP_Hook->do_action() #8 /data/web/e129695/html/wp1/wp-admin/ admin-header.php(102): do_action() #9 /data/web/e129695/html/wp1/wp-admin/admin. php(239): require_once(‘/data/web/e1296…’) #10 {main}  thrown Viewing 12 replies - 1 through 12 (of 12 total) * Plugin Author [Gregor Capuder](https://wordpress.org/support/users/capuderg/) * (@capuderg) * [4 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-spark-post/#post-15147497) * Hi [@moritz0grammer](https://wordpress.org/support/users/moritz0grammer/), * this is a strange issue. What version of PHP are you using? * I just re-tested this with PHP 8.0.8 and 8.1 and the plugin settings open just fine, even when I select SpartPost mailer. No fatal error is produced. * Are you using the SpartPost mailer? Did you recently update the PHP version? * You can also try to reinstall the plugin and see if that will resolve the issue. * Take care! * Thread Starter [moritz0grammer](https://wordpress.org/support/users/moritz0grammer/) * (@moritz0grammer) * [4 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-spark-post/#post-15147839) * I am using Php 8.0 and I am not using the SpartPost mailer. I am using the custom Mail Server provided by my hosting provider and I haven’t touched the PHP settings for a while now. I already reinstalled the plugin but it didn’t resolve the issue. The only thing I did in the last couple of weeks was experimenting with Cache Plugins. I have W3 Cache installed but even when i deactivate all the newly added plugins i get the same Error. * Thread Starter [moritz0grammer](https://wordpress.org/support/users/moritz0grammer/) * (@moritz0grammer) * [4 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-spark-post/#post-15147868) * Sadly i can’t give you the debug information from your debug tool because it also crashes. Thank you for your quick answer and have a nice day! * Plugin Author [Gregor Capuder](https://wordpress.org/support/users/capuderg/) * (@capuderg) * [4 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-spark-post/#post-15148041) * Hi [@moritz0grammer](https://wordpress.org/support/users/moritz0grammer/), * are you may be using a non-english language on your WP site? Which language is it? * Maybe our plugin is also translated to that language? That could mean that the translated string is not using the correct `sprintf` parameters and is causing this issue. * Take care! * Thread Starter [moritz0grammer](https://wordpress.org/support/users/moritz0grammer/) * (@moritz0grammer) * [4 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-spark-post/#post-15148367) * Hi yes I am using the german version of wordpress. The Plugin is also translated to German. At least the menu is. * Plugin Author [Gregor Capuder](https://wordpress.org/support/users/capuderg/) * (@capuderg) * [4 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-spark-post/#post-15149886) * Hi [@moritz0grammer](https://wordpress.org/support/users/moritz0grammer/), * I found the issue. The percentage sign was not “escaped” properly and it causes this issue. * [@robertskiba](https://wordpress.org/support/users/robertskiba/), sorry to bother you again with a translation issue. I fixed a string in (development and stable branch) for the WP Mail SMTP plugin. Could you please accept them as correct translations? * [https://translate.wordpress.org/projects/wp-plugins/wp-mail-smtp/stable/de/default/?filters%5Btranslated%5D=yes&filters%5Bstatus%5D=waiting](https://translate.wordpress.org/projects/wp-plugins/wp-mail-smtp/stable/de/default/?filters%5Btranslated%5D=yes&filters%5Bstatus%5D=waiting) * The issue was in the percentage sign ‘%’ if used in `sprintf` function it has to be escaped with another character, like so ‘%%’. That’s why the original string also has two percentage characters in it (it’s not a mistake). * Thank you! * [Robert Skiba](https://wordpress.org/support/users/robertskiba/) * (@robertskiba) * [4 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-spark-post/#post-15149918) * Done ✅ * Plugin Author [Gregor Capuder](https://wordpress.org/support/users/capuderg/) * (@capuderg) * [4 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-spark-post/#post-15149931) * [@robertskiba](https://wordpress.org/support/users/robertskiba/) Thank you very much! * Are these translation updates automatically updated for the user’s WP site? Or what is the best way to update the translation files in this case? * Take care! * [Robert Skiba](https://wordpress.org/support/users/robertskiba/) * (@robertskiba) * [4 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-spark-post/#post-15149943) * It needs some minutes or hours and then they will update automatically depending on your settings. But if you can’t wait, just exchange the mo file * Thread Starter [moritz0grammer](https://wordpress.org/support/users/moritz0grammer/) * (@moritz0grammer) * [4 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-spark-post/#post-15151433) * Thank you! Now everything works just fine! * Thread Starter [moritz0grammer](https://wordpress.org/support/users/moritz0grammer/) * (@moritz0grammer) * [4 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-spark-post/#post-15151436) * .. * Plugin Author [Gregor Capuder](https://wordpress.org/support/users/capuderg/) * (@capuderg) * [4 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-spark-post/#post-15151574) * Thank you [@robertskiba](https://wordpress.org/support/users/robertskiba/) for everything! * And thanks [@moritz0grammer](https://wordpress.org/support/users/moritz0grammer/) for reporting the issue and confirming it’s resolved. * Have a nice weekend! 🙂 Viewing 12 replies - 1 through 12 (of 12 total) The topic ‘Fatal Error Spark Post’ is closed to new replies. * ![](https://ps.w.org/wp-mail-smtp/assets/icon-256x256.png?rev=1755440) * [WP Mail SMTP by WPForms - The Most Popular SMTP and Email Log Plugin](https://wordpress.org/plugins/wp-mail-smtp/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-mail-smtp/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-mail-smtp/) * [Active Topics](https://wordpress.org/support/plugin/wp-mail-smtp/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-mail-smtp/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-mail-smtp/reviews/) * 12 replies * 3 participants * Last reply from: [Gregor Capuder](https://wordpress.org/support/users/capuderg/) * Last activity: [4 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-spark-post/#post-15151574) * Status: resolved