Error when trying to open PlayScape Exchange catalog on Android -

i'm trying implement playscape sdk gamemaker: studio. i've followed native android integration guide and, after work, got build without errors. however, getting error message when try open playscape exchange catalog , i'm not sure means.

i'm using following code:

package ${yyandroidpackagename};  import ${yyandroidpackagename}.runneractivity; import com.yoyogames.runner.runnerjnilib; //some more general imports go here  import com.playscape.exchange.exchangemanager;  public class gmplayscape extends extensionbase {     public void showexchange()     {         runneractivity.viewhandler.post( new runnable()         {             public void run()              {                 exchangemanager.getinstance().showcatalog();             }         });     } } 

after calling showexchange() own code, i'm getting following error:

e/androidruntime(17482):  fatal exception: main e/androidruntime(17482):  process: com.companyname.playscape_for_android, pid: 17482 e/androidruntime(17482):  java.lang.nullpointerexception: attempt invoke interface method 'void java.util.concurrent.executorservice.execute(java.lang.runnable)' on null object reference e/androidruntime(17482):   @ com.playscape.exchange.exchangemanager.showcatalog(exchangemanager.java:99) e/androidruntime(17482):   @ com.companyname.playscape_for_android.gmplayscape$1.run(gmplayscape.java:38) e/androidruntime(17482):   @ android.os.handler.handlecallback(handler.java:739) e/androidruntime(17482):   @ android.os.handler.dispatchmessage(handler.java:95) e/androidruntime(17482):   @ android.os.looper.loop(looper.java:135) e/androidruntime(17482):   @ android.app.activitythread.main(activitythread.java:5343) e/androidruntime(17482):   @ java.lang.reflect.method.invoke(native method) e/androidruntime(17482):   @ java.lang.reflect.method.invoke(method.java:372) e/androidruntime(17482):   @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:905) e/androidruntime(17482):   @ com.android.internal.os.zygoteinit.main(zygoteinit.java:700) 

after this, application crashes. doing wrong here?

this issues identified bug in sdk. fixed playscape publishing kit 1.15.