There is currently no camera widget based on HTML5. If you want to try it yourself this stackoverflow might be a good start: https://stackoverflow.com/questions/9431475/html5-camera-access
But we might help you to pinpoint why the current widget is not working / crashing. Android or IOS? Does it crash consistently? Hybrid mode?
I believe this is what you are looking for: https://appstore.home.mendix.com/link/app/107943/