Support » Plugin: MailPoet - emails and newsletters in WordPress » PHP warnings choking nginx

  • Resolved velocity4

    (@velocity4)


    From what I can tell in our logs, when a woocommerce customer tries to add an item to their cart or check out under certain conditions, the following warning
    PHP message: PHP Warning: Use of undefined constant MB_CASE_UPPER - assumed 'MB_CASE_UPPER' (this will throw an Error in a future version of PHP) in /var/www/boschmixers.com/htdocs/wp-content/plugins/mailpoet/vendor/symfony/polyfill-mbstring/Mbstring.php on line 533
    is raised so many times that it then induces
    2019/05/10 21:28:44 [error] 26467#26467: *1396248 upstream sent too big header while reading response header from upstream, client: 209.33.198.47, server: boschmixers.com, request: "GET /?add-to-cart=48 HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php7.2-fpm.sock:", host: "www.boschmixers.com", referrer: "https://www.boschmixers.com/"
    For now we’ve disabled the mailpoet plugin.

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