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Error messages when activating plugin

  • Here are the messages:
    ‘Warning: array_key_exists() [function.array-key-exists]: The second argument should be either an array or an object in /…wp-content/plugins/simple-content-reveal/includes/acr-set-defaults.php on line 20

    Warning: session_start() [function.session-start]: Cannot send session cache limiter – headers already sent (output started at /…/wp-content/plugins/simple-content-reveal/includes/acr-set-defaults.php:20) in /…/wp-content/plugins/testimonials-widget-premium/testimonials-widget-premium.php on line 73′

    Looks like there is a conflict with the Testimonials Widget Plugin.

    http://wordpress.org/plugins/simple-content-reveal/

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