A considerable number of my users get this exception. However, I cannot reproduce it on any of my devices.

java.lang.IllegalStateException: IAB helper is not set up. Can't perform operation: queryInventory
at org.onepf.oms.appstore.googleUtils.IabHelper.checkSetupDone(IabHelper.java:806)
at org.onepf.oms.appstore.googleUtils.IabHelper.queryInventory(IabHelper.java:566)
at org.onepf.oms.OpenIabHelper.queryInventory(OpenIabHelper.java:930)
at org.onepf.oms.OpenIabHelper$5.run(OpenIabHelper.java:957)
at java.lang.Thread.run(Thread.java:864)

I can see that you throw IllegalStateException when mSetupDone is false in checkSetupDone() in org.onepf.oms.appstore.googleUtils.IabHelper

I guess we could add 'catch (IllegalStateException ex)' to the queryInventoryAsync method in OpenIabHelper to handle this exception.