Thing.call_device failing


I had worked on device communication using ESP8266 and MKR100 via thing,call_device with success. I restarted my project and now it is not working. Any hint on how to troubleshoot, debug this ?

Also I noticed there is a new type of end point related to call_device, does it require a new version of the IOT server ? I am running:

Name Version Publisher Notes Summary
thinger-maker-server 1.6.2 thinger - Internet Of Things Server

Thank you for the great work on the platform, and your support