Missing refresh token. Please ensure that the 'refresh_token' scope is activated for your connected app in Salesforce.
I'm trying to follow the tutorial for the salesforce CRM integration with AEM 6.3. Integrating with Salesforce
but I'm getting an expected result when click on connect:
Nothing more interesting in the log files (set to debug) :
03.10.2018 10:14:37.314 *INFO* [sling-default-868-com.day.cq.replication.impl.ReverseReplicator.4160] com.adobe.granite.repository Service [7500, [org.apache.jackrabbit.oak.api.jmx.SessionMBean]] ServiceEvent UNREGISTERING 03.10.2018 10:14:43.057 *INFO* [0:0:0:0:0:0:0:1 [1538558082843] GET /libs/mcm/salesforce/customer.json HTTP/1.1] com.adobe.cq.mcm.salesforce.SalesforceClient ErrorCode not found meaning success hence ignoring exception 03.10.2018 10:15:52.004 *INFO* [oak-repository-executor-1] com.adobe.granite.repository Service [7501, [org.apache.jackrabbit.oak.api.jmx.SessionMBean]] ServiceEvent REGISTERED 0

Any insight?
Thanks,
Thomas