Getting "Internal Server Error" when calling A2P SMS APIs in sandbox

I keep getting this error for the past 12 hours. Initially, I figured it was transient, but it has persisted for a while now. Is there anything I need to do to get this resolved? StatusCode: 503, ReasonPhrase: 'Service Unavailable', Version: 1.1, Content: System.Net.Http.StreamContent, Headers: { Connection: keep-alive Retry-After: 40 X-Rate-Limit-Group: light X-Rate-Limit-Limit: 50 X-Rate-Limit-Remaining: 49 X-Rate-Limit-Window: 60 RoutingKey: SJC12P01 RCRequestId: 16ca2286-be15-11ec-bf06-005056bb9532 Date: Sun, 17 Apr 2022 06:10:32 GMT Server: nginx Content-Length: 107 Content-Type: application/json } Content: { "errorCode" : "AGW-110", "message" : "Internal Server Error. Consult RC Support.", "errors" : [ ] } Request: Method: GET, RequestUri: 'https://platform.devtest.ringcentral.com/restapi/v1.0/account/~/a2p-sms/messages', Version: 1.1, Content: <null>, Headers: { X-User-Agent: Unknown/0.0.1 RingCentral.Net/5.0.0 Authorization: Bearer <removed> }