My POS says "Multiple discounts are not supported at this location"

That message comes from Shopify POS, not from Hype. It means the register is being asked to put more than one discount on the same sale and the location cannot do it. Two things decide whether it can: the location has to be on POS Pro, and the discounts involved have to be configured to combine with each other.

Check these in order

1. POS Pro at that location. Automatic discounts — which every Hype campaign set to Automatic is — run at POS Pro locations only. Hype says the same in the campaign's Sales Channels section: "Automatic discount will only be applied to POS Pro locations."
2. Combinations on both discounts. Open the Hype campaign's Combinations section and tick the classes it may combine with, then open the other discount in your Shopify admin and tick the matching box there. Both sides are required.
3. Two product discounts on one line item. Shopify allows this only on Shopify Plus. If both discounts target the same product, that is the limit you are hitting, and combinations settings will not change it.
4. Shipping. Only one shipping discount applies per order, everywhere including POS.

If a competing discount app produces the same message on the same sale, that is a strong sign it is the Shopify limit rather than a Hype problem.

Making a Hype campaign available at POS in the first place

Every campaign has a Sales Channels section with Online Store (and other sales channels) and POS. With POS ticked you can leave All POS locations selected or pick specific ones.

That setting controls where Hype's discount is allowed to run. Depending on how the discount is set up, Shopify may also need it published to the POS channel from Discounts in your Shopify admin — check there if a campaign that looks correct in Hype never appears on the register.

What does not work at POS

• Storefront blocks and live pricing. Progress bars, gift banners and rewritten prices are online-store features. Nothing from Hype renders on a register.
• Gift with purchase auto-add. Adding the free item to the cart is done by Hype's storefront code, which is not running at POS. The discount can still apply to the gift once staff add it to the sale.

Billing note

POS orders are not counted toward your Hype plan's order tier. Only paid online orders count.

Related

• Discounts on POS, draft orders, and subscriptions
• Combining discounts