not able to join network

[changchichung]

OS: ubuntu 22.04 x64

it's ok to login

2023-03-17 09:09:37 [chchang@cba ~ ]$ omniedge login -u abc@abc.com -s s5aDur38CMdrWabcdefghijklmnopqrstuvwxyzCK9dzW0qn4
INFO[0000] You are in mode: prod                        
Enter Password:
INFO[2023-03-17T09:11:49] successful to login 

but failed to join network

2023-03-17 09:11:49 [chchang@cba ~ ]$ sudo omniedge join
INFO[0000] You are in mode: prod                        
INFO[2023-03-17T09:11:57] List Virtual Network response                
🌶 My Omni Network
You choose number 1: My Omni Network
INFO[2023-03-17T09:12:01] Success to join virtual network              
INFO[2023-03-17T09:12:01] Start to connect omniedge                    
2023-03-17T09:12:01 [edge_utils.c:1943] INFOAdding supernode[0] = prod-useast.edgecomputing.network:443
INFO[2023-03-17T09:12:01] Starting omniedge                            
INFO[2023-03-17T09:12:01] Listening address: 100.100.0.56              
2023-03-17T09:12:01 [edge_utils.c:229] INFOsupernode 0 => prod-useast.edgecomputing.network:443
2023-03-17T09:12:01 [edge_utils.c:669] INFOSuccessfully joined multicast group 224.0.0.68:1968
2023-03-17T09:12:16 [edge_utils.c:851] WARNINGSupernode not responding, now trying prod-useast.edgecomputing.network:443
2023-03-17T09:12:44 [edge_utils.c:851] WARNINGSupernode not responding, now trying prod-useast.edgecomputing.network:443
2023-03-17T09:13:24 [edge_utils.c:851] WARNINGSupernode not responding, now trying prod-useast.edgecomputing.network:443

and this loops like forever

any suggestions ????