当我在GSON上运行Proguard时使用应用程序崩溃（使用枚举）

I am using GSON in my Android app to parser the data. I have added an enum in my Model object. After adding an enum my app started crashing. When I made runProguard false everything works fine. I did everything I could find on internet to fix the problem when program is true. But still no luck. in my Android app to parser the