@이진현 - Sorry for delay in response.
We got an update from engineering team that:
The Personal Tab link(https://www2.kif.re.kr:3000/test/ok) doesn't seem to be supported on Android WebView for the webpage. So please check the SSL handling/certificate/related things for your webpage and try it again.
If you are still able to repro, kindly share the app package and code so that we can test it again.