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Original topic: 请教各位大佬,安装遇到的问题Error: failed to fetch component: unknown component
[TiDB Usage Environment] Production Environment / Testing / PoC
[TiDB Version]
[Reproduction Path] What operations were performed when the issue occurred
[Encountered Issue: Issue Phenomenon and Impact]
[Resource Configuration] Go to TiDB Dashboard - Cluster Info - Hosts and take a screenshot of this page
[Attachments: Screenshots/Logs/Monitoring]
Which version did you install, V7.1.1-3?
There is no such version.
Send the installation command. Can you also customize the version!!?
Do you have the complete logs?
Thank you, everyone, the issue has been resolved.
I appreciate your consistency. 
I suggest you mark your preferred answer as the best answer. You can also choose your own.
Your small choice will promote positive feedback throughout the community, ultimately benefiting everyone. 
Adding component_sources
to the configuration file can solve the issue.

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