Hi Ty
The first error is from another module you are using (OnyakTech.Axon) and is most probably not related to your problem.
The second error is about PayPal Express and related to the store. Did you copy all the message? It seems to be missing some information.
Did you setup PayPal Express correctly? I suggest you read Will's post about configuring PayPal express and further debugging here:
https://mmmcommerce.com/F...s/t/248/Paypal-Error