SKU showing on top of "add to basket" button

as you will see from the attached screenshot the product SKU is being displayed on top of the “add to basket” which makes it difficult to add the product to basket and impossible to adjust the quantity with the + / – buttons . . .

see https://fromthebump.uk/product/cant-wait-to-meet-you-love-from-the-bump-any-recipient-yellow-blue-or-pink-greeting-card-%E2%99%A5-celebrate-pregnancy-%E2%99%A5/

please advise how to fix

thank

Glen