1. Firewall is "On." "Block all incoming connections" NOT checked.
2. As I said in my initial post: "...have given Enpass app permission to connect to network but am unable to find the wifisyncserver_bin file anywhere on my computer to also permit it to connect to the network." Consequently, the wifisyncserver_bin file has not been granted permission because I cannot find the file on the MacBook Pro and I have not been able to find it on the internet to download.
3. See # 2.
4. My hunch is that the absence of the file wifisyncserver_bin is the problem, but I won't know until I have been able to add it to the permission list.