Something went wrong. To try again, reload the page and then start the workflow-SharePoint 2013 Platform workflow

Hi,
I want to a workflow application service for SharePoint 2013. By doing this, I created AppManagement Service (both app service and proxy), Subscription Settings Service Application (both app service and proxy) and Workflow service Application Proxy. We have three servers (Web Front end server, App server and Database server). Of course we have a domain server. I installed workflow manager to app server and client workflow manager to web server. I can see the both SharePoint Platform 2010 and 2013 on SharePoint designer 2013. Workflow Service status on Central admin is connected. Service Bus Gateway, Service Bus Message Broker and SharePoint timer service have status of running. (I see those services on app server). However, when I tried to run a very simple workflow to send mail to test, I got a message issue that:
“Something went wrong. To try again, reload the page and then start the workflow”. I can’t find any issue in the in the event viewer of “Microsoft ServiceBus” , “Microsoft –workflow” and SharePoint bin 15 logs. The issue is something wrong for setting up a workflow service application not a simple workflow that I created in SharePoint designer 2013. I wonder if you can help me with this issue. Thank you very much. I very appreciate your help.
Hue Le