RADIUS server not responding

Everything has been running great in Splynx and Mikrotik for over a month now. But this morning I noticed a client is connecting and disconnecting. When I checked the Mikrotik logs I started seeing this error - RADIUS server is not responding.

https://splynx.com/3000/splynx-radius-configuration-and-troubleshooting/

all about radius debugging.

when logs will be available may be it will show us where is a problem.