One ReadyCloud user gets VPN disconnected and one gets no registered devices

I have activated ReadyCloud option usin my local admin account on ReadyNas Device; no issues with that. Then I logged into my ReadyCloud account and invited different users by granting them access to specific folders. They did receive the invite and joined the folder. At this point when they logged into ReadyCloud they could see and access the shared folder. Also, they were able to see and access the same folder through the desktop App. The next day everything disappeared. it said there's no NAS device attached to your account etc....same message on Ready Cloud Web appliaction as well as on desktip application. (These are all non-admin accounts). I tried to unshare the folder and shared again and repeated the same cycle, again after a day or so it went back to the same "No devices attached". 

Second issue:

I as an admin when login to Desktop Application from remote location it always says VPN disconnected. However, I can still access the contents using web application. This is also happening with another non-admin user. This user cannot connect to the VPN and cannot access the contents through Web App either due to the above listed issue.

MY ReadyNas Model is RN102