Joining the Server Group failed with the following errors.

Studio UI:
Please refer to the Windows Event Log on the Authorizer details.


Windows Event Log:
Citrix Cluster Join Service,1,(2201),"Join failed. Exception attempting to authorize. Could not connect to net.tcp://storefrontname/Citrix/ClusterService. The connection attempt lasted for a time span of 00:00:21.0021089. TCP error code 10060: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond IPofstorefrontserver:808."

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Allow all Citrix StoreFront features to pass through Windows firewall:

1. Go to Control Panel > System and Security > Windows Defender FireWall > Allowed Apps
2. Make sure that all the Citrix StoreFront features are allowed under Domain, Private, and Public.

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Problem Cause

Windows firewall has wrongly blocked necessary communication among StoreFront servers via port 808.

Port Requirements of StoreFront:
https://docs.citrix.com/en-us/tech-zone/build/tech-papers/citrix-communication-ports.html#storefront