Can you check once protocol on application server as well on below path. Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\ProtocolsAlso, did you tried to download the configuration and Import it again on beacon ...
@avisekh_yadav Can you check once TLS setting in registry once and also try to redownlaod the configuration.Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\ProtocolsAlso attach Beaconengine.logThanks,Milind