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

  • Resolved 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/ 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:, server:, request: "GET /?add-to-cart=48 HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php7.2-fpm.sock:", host: "", referrer: ""
    For now we’ve disabled the mailpoet plugin.

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