API Explorer complains of CORS issue (using AU server)

Developer Tools
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HI I am trying to use the api explorer in Australia (https://developer.mypurecloud.com.au/developer-tools/#/api-explorer).

This works fine for some calls, but others fail with the error "0 HTTP request was blocked by CORS. Inspect the browser network tab for more information."

One that fails is /api/v2/analytics/queues/observations/query

I am using Firefox v50.0 and also get the same problem on Chrome v55

If I Inspect the browser I get a security message in the console saying "Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://api.mypurecloud.com.au/api/v2/analytics/queues/observations/query. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing)."

I am wondering if this could be because my login is for the Australian server.

Has anyone used this Australian server without having my issue?
Any other suggestions that I could try?

Thanks Mike

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there is a known issue where sometimes if you send an invalid post body an error happens server side and manifests as a cors issue. what is the body you are sending to the query?

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I think this is because it's a POST request, which means you need to use the Analytics Query builder instead of the API explorer. This has nothing to do with the Australian envt, which I'm using too.

https://developer.mypurecloud.com.au/developer-tools/#/analytics-query-builder

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