500 Internal Server Error - Analytics API for getUserRateLimits function using OAuth

[latkan_4]

I am trying to use user_rate_limit RESTful API from Analytics API for my sandbox account for which I have created the user OAuth token. But I am getting the error 500-Internal server error with the below JSON. Can someone help?

{
"errors": [
{
"errorId": 2003,
"domain": "ACCESS",
"category": "APPLICATION",
"message": "Internal error",
"longMessage": "There was a problem with an eBay internal system or process. Contact eBay developer support for assistance"
}
]
}