Connected Systems - a!authorizationLink

Hi there,

I'm following the documentation for intergrating via OAuth as per the below links:

https://docs.appian.com/suite/help/18.1/authorization_link_component.html

https://docs.appian.com/suite/help/18.1/Oauth_connected_system.html

Unfortunately it looks like there's something wrong with the documentation as I'm getting a zero key error as per the below error:

Error: "Expression evaluation error: Syntax error. Details: Cannot create an identifier with zero length key"

   a!richTextItem(
                      text: "Microsoft Office 365",
                     link: a!authorizationLink(
                       label: "Authorize",
                       connectedSystem: local!integrationResult.connectedSystem /* If commented interface renders correctly */
                      )
                    ),

The local variable is equal as follows: [success:false,result:[statusLine=HTTP/1.1 403 Forbidden, statusCode=403, headers=[Cache-Control:private,Transfer-Encoding:chunked,Content-Type:application/json,request-id:6fc642bb-828c-43cb-8898-6fcc77166d59,client-request-id:6fc642bb-828c-43cb-8898-6fcc77166d59,x-ms-ags-diagnostic:{"ServerInfo":{"DataCenter":"UK South","Slice":"SliceA","Ring":"5","ScaleUnit":"001","Host":"AGSFE_IN_2","ADSiteName":"UKS"}},Duration:54.6198,Strict-Transport-Security:max-age=31536000,Date:Wed, 23 May 2018 15:37:57 GMT], contentType=application/json, body=[error:[code:ErrorAccessDenied,message:Access is denied. Check credentials and try again.,innerError:[request-id:6fc642bb-828c-43cb-8898-6fcc77166d59,date:2018-05-23T15:37:57]]]],error:[title=You are not permitted to perform the requested operation, message=The external system understood the request but refused to authorize it, detail=HTTP/1.1 403 Forbidden],connectedSystem:[Connected System:29212],@attributes:[@anyAttribute:[_dirty:false,_bannerText:,_refresh:]]]

Does anyone have any idea how to resolve the above?