error activation The WHMCS WordPress Integration plugin

error activation

The WHMCS WordPress Integration plugin requires the PHP mbstring extensions.:grin:

  • Adam Czajczyk
    • Support Gorilla

    Hello Marcelo,

    I hope you’re well today and thank you for your question!

    Due to the nature of WHMCS the WHMCS WP Integration plugins is using some “workarounds” to interact with it. It seems that the PHP configuration on your server is pretty restricted.

    That said, it’s possible that the “mbstring” is only disabled on your server. In case you do have access to PHP settings (some hosts allow you to change PHP setup via cPanel), look for these settings in php.ini file:

    mbstring.language = all
    mbstring.internal_encoding = UTF-8
    mbstring.http_input = auto
    mbstring.http_output = UTF-8
    mbstring.encoding_translation = On
    mbstring.detect_order = UTF-8
    mbstring.substitute_character = none;
    mbstring.func_overload = 0
    mbstring.strict_encoding = Off

    Above config should make it work if “mbstring” is installed.

    Otherwise you will want to get in touch with your hosting provider’s tech support and ask them if they could install/enable mbstring for you.

    Best regards,


  • Milan
    • WordPress Wizard

    Hello Marcelo,

    I hope you are having a good day.

    In general, mbstring by itself is not a security issue, mbstring + outdated scripts is asking for trouble. And our plugin always uses updated scripts with mbstring. So mbstring should not be any security troubler for you. Feel free to use it please. :slight_smile:

    Hope this helps you.

    Kind Regards,


  • Dimitris
    • Support Star

    Hey there Michelle,

    hope you’re doing good today!

    Could you please start a new thread describing your issues with as more details are possible?

    We prefer to service each member in separate threads as most solutions are member-specific like in this topic which is strictly server related. And also there won’t be any email notifications sending in multiple users who posted in a single thread. Hope you understand! :slight_smile:

    Kind regards,


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