What does this error mean?

Android
1

BackendlessFault{ code: ‘Internal client exception’, message: ‘Unacceptable certificate: CN=Let’s Encrypt Authority X3, O=Let’s Encrypt, C=US’, detail: 'javax.net.ssl.SSLHandshakeException: Unacceptable certificate: CN=Let’s Encrypt Authority X3, O=Let’s Encrypt, C=US

2

It means the client app could not connect to the server via ssl. This may happen for older versions of Android.

Regards,
Mark

3

it’s android things 1.6 and it was working till today and nothings changed from our side!

4

DataQueryBuilder queryBuilder = DataQueryBuilder.create();
queryBuilder.setWhereClause(whereClause );

                        Backendless.Data.of("DoorsU").

    find(queryBuilder,
                                new AsyncCallback<List<Map>>() {
        @Override
        public void handleResponse (List < Map > foundD)
        {
            // every loaded object from the "Contact" table is now an individual java.util.Map
            Log.e("eeeeeeeeeeeee",foundD.toString());
            String doorP = foundD.get(0).get("doorPincode").toString();
            }
        @Override
        public void handleFault (BackendlessFault fault )
        {
            // an error has occurred, the error code can be retrieved with fault.getCode()
            Log.e("Fault",fault.toString());
        }
    });
5

Nothing changed on our side either. Try a different device, network, proxy settings, etc