There has been a critical error on your website. Please check your site admin em

I installed Paid Membership Pro and the add-on plugin PMPro Constant Contact.

After I fill out all the Constant Contact API fields I get this error message.

There has been a critical error on your website. Please check your site admin email inbox for instructions. “Never ever get a email with these error messages”

I ran de-bug in my cPanel and got this information .

Fatal error: Uncaught Error: Call to undefined method Ctct\ConstantContact::getLists() in /home/rescuebi/public_html/wp-content/plugins/pmpro-constant-contact/pmpro-constant-contact.php:622 Stack trace: #0 /home/rescuebi/public_html/wp-includes/class-wp-hook.php(288): pmprocc_options_page(”) #1 /home/rescuebi/public_html/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(”, Array) #2 /home/rescuebi/public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #3 /home/rescuebi/public_html/wp-admin/admin.php(254): do_action(‘settings_page_p…’) #4 /home/rescuebi/public_html/wp-admin/options-general.php(10): require_once(‘/home/rescuebi/…’) #5 {main} thrown in /home/rescuebi/public_html/wp-content/plugins/pmpro-constant-contact/pmpro-constant-contact.php on line 622

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