We're also blocked from testing new app builds since yesterday because of this issue. My iPad makes the following requests to testflight.apple.com: /v1/session/authenticate (200 OK) /v3/accounts/xxx/apps (200 OK) /v1/devices/apns (200 OK) /v2/accounts/xxx/apps/xxx/builds/xxx (500 INTERNAL SERVER ERROR) The body in the response is { "data": null, "error": null}