Internet Explorer 11 doesn't progress past redirect_uri call

[gene1wood]

Here's what I get running this on Windows 7 IE 11

C:\Users\IEUser>maws --verbose
2020-08-06:07:43:35 DEBUG    [cli.py:204] Config : {REDACTED}
2020-08-06:07:43:35 DEBUG    [cache.py:295] There is no ID token file at :\Users\IEUser\AppData\Local\Mozilla AWS CLI\Cache\id_REDACTED or it exists but is readable by others. We won't use it
2020-08-06:07:43:35 DEBUG    [login.py:198] Either the cached ID token was invalid or missing and we need to get a new one, or the user passed no role_arn on the command line so we need to spawn the role picker
2020-08-06:07:43:35 DEBUG    [login.py:213] REDACTED (state), REDACTED (code), 10944248 (id)
2020-08-06:07:43:35 DEBUG    [login.py:234] About to spawn browser window to https://auth.mozilla.auth0.com/authorize?scope=openid&response_type=code&redirect_uri=http%3A%2F%2Flocalhost%3A10800%2Fredirect_uri&client_id=N7lULzWtfVUDGymwDs0yDEq6ZcwmFazj&code_challenge=REDACTED&code_challenge_method=S256&state=REDACTED
2020-08-06:07:43:35 DEBUG    [login.py:239] About to start listener running on port 10800
2020-08-06:07:43:37 DEBUG    [listener.py:165] Listener received a call to /redirect_uri with query parameters: %ImmutableMultiDict([('code', 'REDACTED'), ('state', 'REDACTED')])

While the web browser remains on Federation in progress