I've integrate https://ionicframework.com/docs/native/paypal in my ionic applicarion, but I have this error during login to paypal sandbox. Why?
2021-06-22 15:1[Removed. Phone #s not permitted]17386/io.ionic.starter E/paypal.sdk: request failure with http statusCode:404,exception:
2021-06-22 15:1[Removed. Phone #s not permitted]17386/io.ionic.starter E/paypal.sdk: Exception parsing server response
org.json.JSONException: End of input at character 0 of
at org.json.JSONTokener.syntaxError(JSONTokener.java:460)
at org.json.JSONTokener.nextValue(JSONTokener.java:101)
at com.paypal.android.sdk.cs.m(Unknown Source:7)
at com.paypal.android.sdk.fi.d(Unknown Source:0)
at com.paypal.android.sdk.ce.a(Unknown Source:21)
at com.paypal.android.sdk.ci.a(Unknown Source:62)
at com.paypal.android.sdk.cm.onResponse(Unknown Source:45)
at okhttp3.RealCall$AsyncCall.execute(RealCall.java:135)
at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
2021-06-22 15:1[Removed. Phone #s not permitted]17386/io.ionic.starter E/paypal.sdk: request failed with server response:
2021-06-22 15:1[Removed. Phone #s not permitted]16668/io.ionic.starter E/paypal.sdk: INTERNAL_SERVER_ERROR
