Stash 3.0 exception

We are seeing these exceptions after upgrading to Stash 3.0.4 and update plugin to latest version:
java.lang.RuntimeException: com.atlassian.stash.pull.PullRequestService.findInDirection(Lcom/atlassian/stash/pull/PullRequestDirection;ILjava/lang/String;Lcom/atlassian/stash/pull/PullRequestState;Lcom/atlassian/stash/pull/PullRequestOrder;Lcom/atlassian/stash/util/PageRequest;)Lcom/atlassian/stash/util/Page;
        at com.atlassian.event.internal.SingleParameterMethodListenerInvoker.invoke(SingleParameterMethodListenerInvoker.java:54) ~[atlassian-event-2.3.5.jar:na]
        at com.atlassian.stash.internal.event.AsyncBatchingInvokersTransformer$AsyncInvokerBatch.invoke(AsyncBatchingInvokersTransformer.java:100) ~[stash-platform-3.0.4.jar:na]
        at com.atlassian.event.internal.AsynchronousAbleEventDispatcher$1$1.run(AsynchronousAbleEventDispatcher.java:48) [atlassian-event-2.3.5.jar:na]
        at com.atlassian.sal.core.executor.ThreadLocalDelegateRunnable.run(ThreadLocalDelegateRunnable.java:38) [sal-core-2.11.0.jar:na]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_45]
        at java.lang.Thread.run(Thread.java:744) [na:1.7.0_45]
        ... 1 frame trimmed
Caused by: java.lang.NoSuchMethodError: com.atlassian.stash.pull.PullRequestService.findInDirection(Lcom/atlassian/stash/pull/PullRequestDirection;ILjava/lang/String;Lcom/atlassian/stash/pull/PullRequestState;Lcom/atlassian/stash/pull/PullRequestOrder;Lcom/atlassian/stash/util/PageRequest;)Lcom/atlassian/stash/util/Page;
        at com.atlassian.stash.unapprove.UnapproveReviewersHook$2.get(UnapproveReviewersHook.java:75) ~[na:na]
        at com.atlassian.stash.util.PagedIterable.iterator(PagedIterable.java:23) ~[stash-util-3.0.4.jar:na]
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