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After authorising WooCommerce with Campaign Monitor, I enter the Client ID and Client Secret, and I get the following error message:
Fatal error: Call to undefined method CS_REST_General::authorize_url() in /home/harhope/public_html/wp-content/plugins/campaign-monitor-for-woocommerce/core/CampaignMonitor.php on line 98
If I go back and come off the initial settings page and then go back, it asks me to authorise again and the process repeats.