I have created an event with tickets for purchase on my square site. We want to include the ability for people to purchase additional items they will pickup at the event. I have selected pickup for the event ticket and the extra items, but if someone tries to check out with both items in their cart on the same transaction, there is an error message that says "Unfortunately since your order is already set as manual, you cannot add other items under another fulfillment method. Please remove the items or update your selected fulfillment method." How can I fix this on the back end so they can purchase their event ticket and extra items on the same transaction? I don't want to use event modifiers because it doesn't allow for the quantity of the modifiers.
