Error activating Pro Sites

Hi, I’m getting the following error when network activating Pro Sites. Reading through the boards, all the erros were due to older versions of php. I have 5.5.38 (also lists this in dashboard support).


Plugin could not be activated because it triggered a fatal error.

Fatal error: Cannot redeclare class APIClient in /home/…./…./wp-content/plugins/pro-sites/pro-sites-files/lib/ProSites/Module/Taxamo/lib/Taxamo/Swagger.php on line 28


  • Nithin
    • Support Wizard

    Hi Anthony,

    Hope you are doing good today. :slight_smile:

    Could you please try enabling the Pro Sites plugin with default theme enabled, and with all other plugins disabled, and please check whether you are able to replicate this?

    If it didn’t make any difference ,and you still have the same error. Could you please enable debug mode, to enable it, open your wp-config.php file located in your root directory, and look for define(‘WP_DEBUG’, false);. Change it to:

    define('WP_DEBUG', true);

    In order to enable the error logging to a file on the server you need to add:

    define( 'WP_DEBUG_LOG', true );
    define( 'WP_DEBUG_DISPLAY', false );

    After making the above changes, please activate the Pro Sites plugin. The related errors will be saved to a debug.log log file inside the /wp-content/ directory.

    Please attach these in your next reply in txt format file, so that we could give a closer look. You can find more details about debugging here.

    Please let us know how that goes, have a nice weekend.

    Kind Regards,


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