Hi Ahmad,
Could you check the Cluster Health by running the following command in PowerShell to get an overview of the cluster's status :
“Get-ServiceFabricClusterHealth”
You can also check the Ports connected to Service Fabric Cluster as to connect to a Service Fabric cluster, you need the clusters management endpoint (FQDN/IP) and the HTTP management endpoint port (19080 by default). link
Please check if the following inbound and outbound ports are open.
Outbound ports
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