Replication: Getting Cannot Apply Value 'NULL' to Property ServerInstance

I have set up replication between a SQL 2012 and a SQL 2016 server.  On the 2016 Server in SSMS when I right click on the Local Subscription I get the error below. Does anyone know how to correct this? I am logged in with a domain account that is admin on the server and sysadmin in the database.

Cannot apply value 'null' to property ServerInstance: Value cannot be null

Thanks!

Mark.