Payment Gateway error in MarketPress

Okay, I set up paypal express checkout and stripe with the correct settings. Stripe of course the testing settings right now.

I get an error with the paypal express checkout of "There was a problem connecting to PayPal to setup your purchase. Please try again.
10002 - Security error - Security header is not valid"

And the error with the stripe is There was an error processing your card: "Invalid API Key provided: sk_test_*****************".

Is there something I am doing wrong? Or am I supposed to be getting errors that I didn't realize? It is just strange that both are erroring and I have rechecked the settings to be sure they are correct.

Thanks for your help!