Noticed in TM1 10.2.2
If trying to connect to TM1 Server from network, it does not show up in the list of available servers.
However TM1 Server is visible in a local client.
Make the next changes in IBM Cognos Configuration where TM1 Admin Server is installed:
Support pre-TLS v1.2 clients = True
Restart TM1 Admin Server
Add “SupportPreTLSv12Clients=T” parameter to Tm1s.cfg file of your TM1 Server
Save Tm1s.cfg and restart TM1 server.
Now the issue should be fixed.
Cognos/TM1 
One more scenario is there.
If we have partially saved files in the data folder, the same issue will happen.
LikeLike