[Python] Robobrowser won't change cookies

I have a POST request sent to server from robobrowser, and the server responds with no data. The response headers are as follows (this is the response from Chrome browser and it's the way it supposed to be):

Cache-Control:no-cache, no-store, must-revalidate
Content-Length:335
Content-Type:application/json; charset=utf-8
Date:Wed, 02 Aug 2017 17:01:17 GMT
Expires:-1
lg:2673
Pragma:no-cache
Server:Unknown
Set-Cookie:BrandingUserLocationGroupID=ic4DUh/NXVp8VOKAtyDgbA==; expires=Fri, 01-Sep-2017 17:01:16 GMT; path=/; secure; HttpOnly
Set-Cookie:.AIRWATCHAUTH=A69C1A5EE8A5F3626385F35DA1B104EE7DFF5E5AF549DDB02EE8ED53931A0585C0FBB8299E3FC7B428A982B9826EF68390E659F4A74DCE00E195601F400D6E69F53907DADED4194F32DD08A72BA212DCCD0D23AB7C5BD56171E6C55EF1BE90849E9C81B2DAE23B05CA6E361326F44604; expires=Thu, 03-Aug-2017 17:01:17 GMT; path=/; secure; HttpOnly
Strict-Transport-Security:max-age=31536000;includeSubDomains
user:5679
X-Content-Type-Options:nosniff
x-download-options:noopen
x-frame-options:SAMEORIGIN
X-XSS-Protection:1; mode=block


it looks like server is resetting cookies, but my robobrowser instance does not respond/refresh to new cookies. basically, the website is trying to switch sessions/change cookies I think, but my python robobrowser does not reflect that or does not allow it to change for some reason

Here is my POST request and response:

browser=RoboBrowser()
browser.session.headers['X-Requested-With']='XMLHttpRequest'
browser.open('https://example.com/test/Users/set-role?id='+role_id+'&__RequestVerificationToken='+token,method='POST')
print browser.response.content


This gives me the following error message:

{"RedirectUrl":null,"IsSuccess":false,"Message":"Save Failed","CustomMessage":null,"Errors":[{"Key":"","Value":["An error has occurred. This error has automatically been saved for further analysis. Please contact technical support."]}],"Messages":{},"HasView":false,"ViewHtml":null,"ViewUrl":null,"IsValidationException":false,"IsValidationWarning":false,"ReloadPage":false,"IsSessionExpired":false,"Script":null,"NextWizardUrl":null,"PreviousWizardUrl":null,"ShowDialog":false}


Does anyone know how to get robobrowser to respond to new cookies?

Added screenshot of cookie from Developer Tools in Chrome. The red box highlighted is where the change occurs once the link is clicked.

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