HarmonyOS 鸿蒙Next Graphics3D demo运行崩溃

https://gitee.com/harmonyos_samples/Graphics3D/issues/IAI0P9?from=project-issue

在模拟器上运行，点击任何一个示例按钮后app闪退
报错：
Error message:Cannot read property load of undefined
Stacktrace:
at init (entry/src/main/ets/graphics3d/ContainerPage.ets:64:7)
at aboutToAppear (entry/src/main/ets/graphics3d/ContainerPage.ets:49:5)
at onJumpClick (entry/src/main/ets/pages/Index.ets:26:5)
at anonymous (entry/src/main/ets/pages/Index.ets:40:15)

DevStudio ： DevEco Studio NEXT Developer Beta2
SDK ：API Version 12