Missing method get_RootPage in assembly (Android)

I'm getting this error in Android, how can I debug it??

[Mono] Assembly Loader probing location: '/mnt/sdcard/Android/data/com.MYAPP.Android/files/.__override__/MYAPP.dll'.
[Mono] AOT module '/mnt/sdcard/Android/data/com.MYAPP.Android/files/.__override__/MYAPP.dll.so' not found: Cannot load library: load_library[1091]: Library '/data/data/com.MYAPP.Android/lib//mnt/sdcard/Android/data/com.MYAPP.Android/files/.__override__/MYAPP.dll.so' not found
[] Missing method get_RootPage in assembly /mnt/sdcard/Android/data/com.MYAPP.Android/files/.__override__/MYAPP.dll, type MYAPP.App
[Mono] The class MYAPP.App could not be loaded, used in MYAPP