I don't think it's a known issue, didn't see anything about it in here
Neither Google chrome, nor Edge insider can load the components section of Packetmon extension in WAC 1909. I even waited several minutes and all I saw was loading icon circling.
I'm connected to a Windows server 2019 data center edition virtualized on Hyper-V, through a SSTP VPN connection.
so because I'm trying to manage my virtual server from a non-domain computer, I have to first use a VPN to connect to the server's private network and then I am able to type in the private (local) IP address of the server in the WAC and add it to the list of servers to manage.