Delphi 12安装报错“Cannot load data from the server: Invalid property value”求助

Windows 11不再支持Delphi 7，我尝试安装Delphi 12时，在下载LivePreview组件阶段出现以下错误：

Cannot load data from the server: Invalid property value

目前Delphi能正常启动，但无法进行任何设计操作。联系Embarcadero官方支持后，得知我的许可证不涵盖技术支持服务，只能到社区求助。以下是相关安装日志片段：

[2025-06-02 18:01:27] [INFO ] Executing command ""C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\regasm.exe" "c:\program files (x86)\embarcadero\studio\23.0\bin\Embarcadero.Studio.Modeling.dll""...
[2025-06-02 18:01:28] [INFO ] Installation of "Modeling Community" completed with success.
[2025-06-02 18:01:28] [INFO ] Downloading "InterBase Redist"...
[2025-06-02 18:01:42] [INFO ] Extracting "InterBase Redist"...
[2025-06-02 18:01:48] [INFO ] Extracting "Interbase_redist.zip" to "C:\Users\Public\Documents\Embarcadero\Interbase"...
[2025-06-02 18:01:50] [INFO ] Installing "InterBase Redist"...
[2025-06-02 18:01:50] [INFO ] Adding environment variable "IBREDISTDIR" with value "C:\Users\Public\Documents\Embarcadero\InterBase\redist\InterBase2020"...
[2025-06-02 18:01:50] [INFO ] Adding value "PATH" to registry path "HKEY_CURRENT_USER\SOFTWARE\Embarcadero\BDS\23.0\Environment Variables"...
[2025-06-02 18:01:50] [INFO ] Adding value "PATH" to registry path "HKEY_LOCAL_MACHINE\SOFTWARE\Embarcadero\BDS\23.0\Environment Variables"...
[2025-06-02 18:01:50] [INFO ] Adding value "IBREDISTDIR" to registry path "HKEY_LOCAL_MACHINE\SOFTWARE\Embarcadero\BDS\23.0\Environment Variables"...
[2025-06-02 18:01:50] [INFO ] Installation of "InterBase Redist" completed with success.
[2025-06-02 18:01:51] [INFO ] Downloading "LivePreview"...
[2025-06-02 18:01:55] [INFO ] Extracting "LivePreview"...
[2025-06-02 18:01:57] [DEBUG] UpdateStatus: [-102] Invalid property value
[2025-06-02 18:01:57] [ERROR] Cannot load data from the server: 
Invalid property value
[2025-06-02 18:01:57] [ERROR] Cannot load data from the server: 
Invalid property value
[2025-06-02 18:01:57] [ERROR] A problem occurred during the process.
[2025-06-02 18:01:57] [INFO ] Installation End
[2025-06-02 18:02:00] [DEBUG] GetIt: 2025-06-02 18:01:57 - A problem occurred during the process.
[2025-06-02 18:02:00] [DEBUG] GetIt: 2025-06-02 18:01:57 - Cannot load data from the server: 
Invalid property value
[2025-06-02 18:02:00] [DEBUG] GetIt: 2025-06-02 18:01:57 - Cannot load data from the server: 
Invalid property value

可行的解决步骤 #

• 清理GetIt缓存
  找到GetIt缓存目录（默认路径：C:\Users\<你的用户名>\AppData\Local\Embarcadero\GetIt），删除该目录下所有文件和文件夹，然后重新运行Delphi安装程序，选择修复安装。

• 手动安装LivePreview组件

  1. 打开Delphi，进入Tools > GetIt Package Manager
  2. 在搜索框输入LivePreview，找到对应组件后尝试手动下载安装
  3. 若仍报错，检查网络连接是否稳定，是否有防火墙/代理拦截了GetIt的服务器请求；如果有离线安装包，切换到离线模式安装。

• 修复.NET Framework
  日志显示安装过程调用了.NET Framework的regasm.exe，可能存在.NET Framework损坏。打开控制面板，进入程序和功能，找到Microsoft .NET Framework 4.x，选择更改，执行修复操作。

• 重置Delphi配置
  关闭Delphi，按住Ctrl+Shift键启动Delphi，在弹出的对话框中选择Reset to default settings，重置后再尝试使用设计器。

• 用管理员权限重新修复安装
  右键点击Delphi安装程序，选择以管理员身份运行，再次执行修复安装，避免权限不足导致组件安装失败。

内容的提问来源于stack exchange，提问作者Teet Kalm