Has this happened before/to anyone else?

When a user goes through the woo commerce checkout to purchase membership, once the order has completed and woocommerce displays the Order Complete/Details page confirming everything went through, there is a visible error message: (see attached screenshot)

Um-switcher
Warnining:in_array()expects parameter 2 to be array, null given in…..core/actions/woo-commerce-order.php on line 19

This is what line 19 says on um-woocommerce extension:

if ( get_post_meta( $id, '_um_woo_product_role', true ) != '' && !in_array( $user_role, $excludes ) ) {
				um_fetch_user( $user_id );
				$ultimatemember->user->set_role( esc_attr( get_post_meta( $id, '_um_woo_product_role', true ) ) );
			}

When reading this I realized that there may be a conflict happening with UM-woocommerce extension for products and UM- switcher as both allow to change user roles when a product is purchased. So I left the UM-woocommerce extension blank and used only UM switcher which eliminated all of the code, except “Um-switcher” still displays just above the Order Details header. (The also happens if I do the reverse, leave Um-switcher blank for user role but set it using the um-woocommerce extension).

Obviously this will not do for users experience during checkout. I tried the usual route in switching themes to 2017 and when using both Um-woocoomerce and um-switcher the conflict is still there. I need to use um-woocommerce for other, non-membership products that should only be seen by certain levels of membership but need um-switcher for paid memberships.

This site needs to go live this week. Any suggestions? Thanks!