Getting error adding new subscribers in Snapshot Agent.

Migrated from SQL 2012 to SQL 2016. Now getting error adding new subscribers in Snapshot Agent.

Error Message  One :
Error messages:
Message: Unable to complete login process due to delay in opening server connection
Stack:    at Microsoft.SqlServer.Replication.Snapshot.SqlServer.NativeBcpOutProvider.ThrowConnectionFailureException(CConnection* pNativeConnectionWrapper)
   at Microsoft.SqlServer.Replication.Snapshot.SqlServer.NativeBcpOutProvider.InitializeNativeBcpOutProvider(LogMessageCallback logMessageCallback, String strName, String strApplication, String strHost, String strServer, String strNetwork, Int32 encryptionLevel, String strDatabase, SecurityMode securityMode, String strLogin, SecureString strPassword, Int32 bcpBatchSize, Int32 loginTimeout, Int32 queryTimeout, Int32 packetSize, DeadlockPriority deadlockPriority, String strRowDelimiter, String strFieldDelimiter, Byte syncMethod, Boolean forceOdbcBcp, Boolean forceOleDbBcp, Boolean enableMultipleActiveResultSets, Boolean useReadPastHint, Boolean usePageLockHint)
   at Microsoft.SqlServer.Replication.Snapshot.TransSnapshotProvider.InstantiateBcpOutProviderWorker(String strBcpConnectionName)
   at Microsoft.SqlServer.Replication.Snapshot.SqlServerSnapshotProvider.InstantiateBcpOutProvider(String strBcpConnectionName) (Source: MSSQLServer, Error number: 0)
Get help: http://help/0
Message: Unable to complete login process due to delay in opening server connection
Stack:    at Microsoft.SqlServer.Replication.Snapshot.SqlServer.NativeBcpOutProvider.ThrowNativeBcpOutException(CConnection* pNativeConnectionWrapper)
   at Microsoft.SqlServer.Replication.Snapshot.SqlServer.NativeBcpOutProvider.ThrowConnectionFailureException(CConnection* pNativeConnectionWrapper) (Source: MSSQLServer, Error number: 0)
Get help: http://help/0

Error Message 2:
Error messages:
Message: TCP Provider: The semaphore timeout period has expired.
Stack:    at Microsoft.SqlServer.Replication.Snapshot.SqlServer.NativeBcpOutProvider.ThrowNativeBcpOutException(CConnection* pNativeConnectionWrapper)
   at Microsoft.SqlServer.Replicatio

Kiran