我今天又重装了一次，这次在创建workspace你报错了org.python.pydev没办法加载，这个改如何解决？
日志信息：
```
Errors occurred during the build.
Error instantiating builder 'org.python.pydev.PyDevBuilder'.
Plug-in org.python.pydev was unable to load class org.python.pydev.builder.PyDevBuilder.
An error occurred while automatically activating bundle org.python.pydev (170).
Plug-in org.python.pydev was unable to load class org.python.pydev.builder.PyDevBuilder.
An error occurred while automatically activating bundle org.python.pydev (170).
```
日志信息：
```
Errors occurred during the build.
Error instantiating builder 'org.python.pydev.PyDevBuilder'.
Plug-in org.python.pydev was unable to load class org.python.pydev.builder.PyDevBuilder.
An error occurred while automatically activating bundle org.python.pydev (170).
Plug-in org.python.pydev was unable to load class org.python.pydev.builder.PyDevBuilder.
An error occurred while automatically activating bundle org.python.pydev (170).
```
