RingCentral Meetings - can't schedule a meeting or changing PMI

This morning RingCentral Meetings API are not function well. That results in users unable to schedule meetings AND change their PMI. There may be additional features impacted.

I went to change some settings in PMI from app.ringcentral.com and noticed that JavaScript throws an error:

Uncaught (in promise) Error: Api Error: Please check local network crash. method: get, url: https://api-ucc.ringcentral.com/restapi/v1.0/account/~/extension/~/meeting/user-settings
    at JNetworkError.JError [as constructor] (fiji-core-foundation.607749f4.min.js:1)
    at new JNetworkError (fiji-core-foundation.607749f4.min.js:1)
    at CommonResponseParser._parseByStatus (fiji-core-framework.fb92133b.min.js:1)
    at CommonResponseParser.parse (fiji-core-framework.fb92133b.min.js:1)
    at ResponseParser.parse (fiji-core-framework.fb92133b.min.js:1)
    at NetworkClient.<anonymous> (fiji-core-framework.fb92133b.min.js:1)
    at step (fiji-core-framework.fb92133b.min.js:1)
    at Object.next (fiji-core-framework.fb92133b.min.js:1)
    at fulfilled (fiji-core-framework.fb92133b.min.js:1)
...
VM11:1 POST https://sentry.io/api/1448026/store/?sentry_key=somekey&sentry_version=7 413 (Request Entity Too Large)
...
VM11:1 PUT https://api-ucc.ringcentral.com/restapi/v1.0/account/~/extension/~/meeting/xxxyyyzzzz 503 (Service Unavailable)

When looking at Network tab in devtools,

• https://api-ucc.ringcentral.com/restapi/v1.0/account/~/extension/~/meeting/xxxyyyzzzz OPTIONS works just fine
• PUT gives 503 Service Unavailable with response below

{
  "errorCode" : "AGW-105",
  "message" : "Internal Server Error. Consult RC Support.",
  "errors" : [ ]
}

POST to https://sentry.io/api/1448026/envelope/?sentry_key=somekey&sentry_version=7 gets an OK

The next POST to that URL throws 413 Request Entity Too Large.

This issue does not happen with RingCentral Video. Just RingCentral Meetings API is impacted.