errno: -4058

Hello, My Thingworx studio 8.3.3.3774, When I create a new projection，save the projection，the erro is coming, log is [09/07/2018 14:50:27] errno: -4058, [09/07/2018 14:50:27] code: 'ENOENT', [09/07/2018 14:50:27] syscall: 'open', [09/07/2018 14:50:27] path: 'C:\\Users\\Administrator\\Documents\\VuforiaStudio\\Projects\\myfirst_1\\appConfig.json' } [09/07/2018 14:50:27] error: [twx-studio:index] uncaughtException { Error: C:\Users\Administrator\Documents\VuforiaStudio\Projects\myfirst_1\appConfig.json: ENOENT: no such file or directory, open 'C:\Users\Administrator\Documents\VuforiaStudio\Projects\myfirst_1\appConfig.json' the path exist,but the appConfig.json is not in every projection files. help me, thank you !