Salesforce Commerce Cloud Fix Paypal Link Cartridge Integration

Hi im developing a sfcc project and currently trying to integrate the paypal link cartridge, but im getting an error when i try to process an order, already i can process payments trought the miciart paypal btn but when i try with a guest user or a logged user trought storefront it crash we are a team of new developers but havent found the solution to this do you know how can i fix it?