Ionic 4 in android 5 generate errors

Please i am builing an app in ionic 4. the application work fine when i test it on chrome browse. but when i build in android and run it on my note 3 (android 5) device it not work fine, the style is not . and the console show this message . The key “viewport-fit” is not recognized and ignored.
the same error occur when i run it inside native browser of my phone.

Please ist there any solution. i want my app to able to run from android 5