Hello @최동윤/DONGYUN CHOI,
Welcome to Microsoft Q&A forum.
Please try following suggestions and let us know if you can successfully install the VS 2019 offline.
- Open layout folder and follow this document: Manually install certificates from a layout folder to manually import the certificates.
- Try to move the layout back to the machine with network connection and run the command with --verify and --fix parameters(for example: vs_community.exe --layout c:\layout --add XXXX --add XXXX --verify --fix) this time to verify and fix any corrupted files or packages.
- Try to use --noWeb parameter when you install the VS offline by using the command line.
Besides, are there any other versions of Visual Studio installed on your offline machine? Did you perform any additional operations when you were moving the layout folder to the offline machine?
Sincerely,
Tianyu
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.