Import failure

Hi

Your Plugin seems be be the solution we are looking for. But at the moment, we have this problem:

After installing v3.1.0, submitting username, API key and settings saved,
we clicked on “Import”, and got this:

PHP Fatal error: Uncaught Error: Cannot use object of type WP_Error as array in /var/www/web371/html/wp-content/plugins/olalaweb-mailchimp-campaign-manager/class/MailchimpCampaigns.php:90
Stack trace:
#0 /var/www/web371/html/wp-content/plugins/olalaweb-mailchimp-campaign-manager/class/MailchimpCampaigns.php(15): MailchimpCampaigns->fetch()
#1 /var/www/web371/html/wp-content/plugins/olalaweb-mailchimp-campaign-manager/class/MailchimpAdmin.php(257): MailchimpCampaigns->__construct()
#2 /var/www/web371/html/wp-content/plugins/olalaweb-mailchimp-campaign-manager/class/MailchimpAdmin.php(267): MailchimpAdmin->import()
#3 /var/www/web371/html/wp-includes/plugin.php(524): MailchimpAdmin->import_ajax(”)
#4 /var/www/web371/html/wp-admin/admin-ajax.php(91): do_action(‘wp_ajax_mailchi…’)
#5 {main} thrown in /var/www/web371/html/wp-content/plugins/olalaweb-mailchimp-campaign-manager/class/MailchimpCampaigns.php on line 90

Thanks for your help.
Eric