Fatal error: Uncaught Error: Call to a member function get_id() on null in /srv/users/shirtsy1/apps/shirtsy/public/wp-content/plugins/sprout-invoices-addon-auto-billing/controllers/Sprout_Billings_Checkout.php:97 Stack trace: #0 /srv/users/shirtsy1/apps/shirtsy/public/wp-includes/class-wp-hook.php(307): SI_Sprout_Billings_Checkout::add_card_selection(Array, Object(SI_Checkouts)) #1 /srv/users/shirtsy1/apps/shirtsy/public/wp-includes/plugin.php(189): WP_Hook->apply_filters(Array, Array) #2 /srv/users/shirtsy1/apps/shirtsy/public/wp-content/plugins/sprout-invoices-pro/controllers/payment-processing/Credit_Card_Processors.php(258): apply_filters('sa_credit_field...', Array, Object(SI_Checkouts)) #3 /srv/users/shirtsy1/apps/shirtsy/public/wp-content/plugins/sprout-invoices-pro/controllers/payment-processing/Credit_Card_Processors.php(65): SI_Credit_Card_Processors->payment_fields(Object(SI_Checkouts)) #4 /srv/users/shirtsy1/apps/shirtsy/public/wp-includes/class-wp-hook.php(307): SI_Credit_Card_Processors->process_payment_page in /srv/users/shirtsy1/apps/shirtsy/public/wp-content/plugins/sprout-invoices-addon-auto-billing/controllers/Sprout_Billings_Checkout.php on line 97
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