You or a user is trying to submit a payment through the website using the PayPal option. After selecting PayPal as the option and fill out the appropriate information to submit payment, a message is received that indicates PayPal is down, or there is an Internal Server Error.
The message typically indicates the PayPal service is down, not the Sphere service. Please check with PayPal to verify if their service is working at the time. Another payment type, like credit card, could be used in the interim.