question

[UPDATE]

For clarification, a permanent fix was submitted to the PlayFab SDK, and so you should not modify PlayFab files.

https://api.playfab.com/releaseNotes/#171016

Simply update to the latest PlayFab SDK via Editor Extensions, or this UnityPackage.

[Original Post]

We have figured out the issue now.

The recent Unity patch seems to have broken something inside of the Unity WWW class. The failure os on a line where we are trying to fetch the response headers from the result.

Formerly, if there were no headers, Unity would return an empty dictionary, and we'd proceed as normal. Now, Unity is instead just throwing an exception. We've got a small update that can fix this error, but ultimately it's a bug in Unity.

We'll release this fix officially as soon as we can, but until then, here's the fix you can copy/paste manually.

replace lines 161 & 162:

string encoding;
if (www.responseHeaders.TryGetValue("Content-Encoding", out encoding) && encoding.ToLower() == "gzip")

With this:

string encoding;
Dictionary<string, string> responseHeaders = null;
try {
	responseHeaders = www.responseHeaders;
} catch (Exception) { }
if (responseHeaders != null && responseHeaders.TryGetValue("Content-Encoding", out encoding) && encoding.ToLower() == "gzip")

And this will get you working again. Sorry for the inconvenience.