simplify card not processing

Good Day,

For some reason the Simplify Mastercard payment option does not process cards when emailed invoice is used. It works fine in sandbox mode, but in live mode using a test payment I get this error:

Fatal error: Uncaught exception ‘Exception’ with message ‘Payment was declined – please try another card.’ in /woocommerce/includes/gateways/simplify-commerce/class-wc-gateway-simplify-commerce.php:455 Stack trace: #0 /woocommerce/includes/gateways/simplify-commerce/class-wc-gateway-simplify-commerce.php(585):
WC_Gateway_Simplify_Commerce>process_standard_payments(Object(WC_Order), ‘6731de82-1553-4…’, ”) #1
/woocommerce/includes/class-wc-form-handler.php(330): WC_Gateway_Simplify_Commerce->process_payment(590) #2 [internal function]: WC_Form_Handler::pay_action(Object(WP)) #3 /home/wp-includes/plugin.php(601):
call_user_func_array(Array, Array) #4 /home/chris/www/lunagrown/wp-includes/class-wp.php(737): do_action_ref_array(‘wp’, Array) #5 /home/wp-includes/functions.php(952): WP->main(”) #6 /home/wp-blog-header.php(16): wp() #7 in /home/chris/www/lunagrown/wp-content/plugins/woocommerce/includes/gateways/simplify-commerce/class-wc-gateway-simplify-commerce.php on line 455

I have switched back to an earlier version for not. Any assistance would be greatly appreciated. The new features are great and I look forward to implementing.

Thank you in advance!
Chris

https://wordpress.org/plugins/woocommerce/