PayPal error fetching the PayPal token at eval

Dear an anyone help me please? I have OpenCart Version 3.0.3.2 and got the error on paypal exxpress checkout:

Error: Error: There was an error fetching the PayPal token at eval (eval at globalEval (https://tienda.africanbeauty.cl/catalog ... .js:2:2536), :22:21) at _loop (https://www.paypalobjects.com/api/checkout.js:775:46) at ZalgoPromise._proto.dispatch (https://www.paypalobjects.com/api/checkout.js:792:53) at ZalgoPromise._proto.resolve (https://www.paypalobjects.com/api/checkout.js:747:66) at https://www.paypalobjects.com/api/checkout.js:733:41 at XMLHttpRequest. (https://www.paypalobjects.com/api/checkout.js:1088:24) at Object._RECEIVE_MESSAGE_TYPE. [as postrobot_message_response] (https://www.paypalobjects.com/api/checkout.js:4186:27) at receiveMessage (https://www.paypalobjects.com/api/checkout.js:4217:48) at messageListener (https://www.paypalobjects.com/api/checkout.js:4236:9)

How can I solve this?

Your API credentials are either invalid or you are using other API protocols than the API signature as per PayPal also provides. PP Express checkout payment extension module only supports API signature and Seamless logins from the core.