I need help top resolve this error

[praj_68]

I am looking to solve this error : 

{
"errors": [
{
"errorId": 215002,
"domain": "ACCESS",
"category": "REQUEST",
"message": "Internal errors as fetching master key",
"longMessage": "Internal errors as fetching master key to fulfill the request."
}
]
}

We have tried reattempting but unable to get the data, we are lookingh to get the payout data,  connecting API used : https://apiz.sandbox.ebay.com/sell/finances/v1/payout

[hyperretail]

Do you get any solution for this error? i have same like this