Unknown URL error on user registration on android 9. All other android versions works well

So i have this error whereby only android phones running on android 9 cannot register user via REST api. I build app debug using prod and console error i am getting is unknown url. The most confusing part is it sometimes works fine. Is this an issue with my server or it is an issue to do with api leve 28?

Yes api not working in android 9 due to ssl issue, a solution is remove webview plugin

@gokujy thanks let me try that.