Unable to run chat with rendezvous example

I am trying to get to run the chat-with-rendezvous , Unable to do it even on publicly routable server. getting this following error. Can somebody help me here.

2024-04-21T18:12:10.350Z	WARN	p2p-config	config/config.go:304	rcmgr limit conflicts with connmgr limit: conn manager high watermark limit: 192, exceeds the system connection limit of: 156
2024-04-21T18:12:10.375Z	INFO	rendezvous	chat-with-rendezvous/chat.go:109	Host created. We are:12D3KooWCJodjWQjktud8YoKCuW6U2J2XmBGXEzD4ThAvYvcY43i
2024-04-21T18:12:10.377Z	INFO	rendezvous	chat-with-rendezvous/chat.go:110	[/ip4/127.0.0.1/tcp/6666 /ip4/192.168.1.12/tcp/6666]
2024-04-21T18:12:10.386Z	WARN	dht/RtRefreshManager	rtrefresh/rt_refresh_manager.go:187	failed when refreshing routing table2 errors occurred:
	* failed to query for self, err=failed to find any peer in table
	* failed to refresh cpl=0, err=failed to find any peer in table


2024-04-21T18:12:11.386Z	INFO	rendezvous	chat-with-rendezvous/chat.go:143	Announcing ourselves...
2024/04/21 18:12:13 failed to sufficiently increase receive buffer size (was: 208 kiB, wanted: 2048 kiB, got: 416 kiB). See https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes for details.
2024/04/21 18:12:13 websocket: failed to close network connection: close tcp [2401:4900:1f24:4084:60ff:660b:865e:e47e]:33144->[2604:1380:4602:5c00::3]:443: use of closed network connection
2024-04-21T18:12:14.147Z	WARN	net/identify	identify/id.go:399	failed to identify 12D3KooWM2zvoiqybyv5WSixKUecNkMGCZ228YjE8ypEmBhiie96: Application error 0x1 (remote): conn-72557649: system: cannot reserve inbound connection: resource limit exceeded
2024-04-21T18:12:14.435Z	WARN	net/identify	identify/id.go:399	failed to identify 12D3KooWM2zvoiqybyv5WSixKUecNkMGCZ228YjE8ypEmBhiie96: Application error 0x1 (remote): conn-72557658: system: cannot reserve inbound connection: resource limit exceeded