解决：如果要创建从现有的源项目，你需要创建一个新的目录，然后把项目的目录树到新目录中。然后，导入时指向新的目录。

Solved: If you want to "Create project from existing source", you need to create a new directory and then put the project directory tree into that new directory. Then point to the new directory when importing.