Amazon Elastic Compute Cloud (N. Virginia) API Errors

POST https://console.aws.amazon.com/ec2/ecb?call=authorizeIngress?&mbtc=413645335 400 (Bad Request)

response:

{"__type":"com.amazon.ec2ux.backend.master#ClientError","error":"An internal error has occurred"}

Also seeing, perhaps related perhaps not, that the remote logging request is failing the options call due to: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://console.aws.amazon.com' is therefore not allowed access. The response had HTTP status code 403.