No sound for motion in app

There are no app sounds for events. For example if there is motion or someone presses the button there is no sound from the app. The notification appears on my phone but just no sound. The recording is also working.I noticed a bunch of files in my phone notification folder with names like Ring-Antique Ding Dong, Ring-Default.These files do not have a file extension like mp3 which my other notification sounds have. If I click on any of these in my android phone files app it does not know what to do with itAny help is greatly appreciated