最新的代码pull下来无法进入具体模块

[seeeeal]

2021-07-01 19:18:16.077 14324-14324/com.example.leancloud_demo W/System.err: java.lang.ClassNotFoundException: com.example.avoscloud_demo.demo.ObjectDemoActivity
2021-07-01 19:18:16.077 14324-14324/com.example.leancloud_demo W/System.err: at java.lang.Class.classForName(Native Method)
2021-07-01 19:18:16.077 14324-14324/com.example.leancloud_demo W/System.err: at java.lang.Class.forName(Class.java:454)
2021-07-01 19:18:16.078 14324-14324/com.example.leancloud_demo W/System.err: at java.lang.Class.forName(Class.java:379)
2021-07-01 19:18:16.078 14324-14324/com.example.leancloud_demo W/System.err: at com.example.leancloud_demo.DemoGroupActivity.startActivityByName(DemoGroupActivity.java:114)
2021-07-01 19:18:16.078 14324-14324/com.example.leancloud_demo W/System.err: at com.example.leancloud_demo.DemoGroupActivity.onListItemClick(DemoGroupActivity.java:125)
2021-07-01 19:18:16.078 14324-14324/com.example.leancloud_demo W/System.err: at android.app.ListActivity$2.onItemClick(ListActivity.java:323)
2021-07-01 19:18:16.078 14324-14324/com.example.leancloud_demo W/System.err: at android.widget.AdapterView.performItemClick(AdapterView.java:330)
2021-07-01 19:18:16.078 14324-14324/com.example.leancloud_demo W/System.err: at android.widget.AbsListView.performItemClick(AbsListView.java:1198)
2021-07-01 19:18:16.078 14324-14324/com.example.leancloud_demo W/System.err: at android.widget.AbsListView$PerformClick.run(AbsListView.java:3193)