Cannot create Anchor Patch for GIT

I was trying to create precommit review but without success.
Before revision exists in FE but after is empty?
Is it a problem for Crucible that after revision is empty?

Creating precommit review without anchor works.

IDE Connector sends request (see attachement) and HTTP 500 is generated:

com.atlassian.theplugin.commons.remoteapi.RemoteApiException: Server returned HTTP 500 (Internal Server Error)
Reason:
Message: Unable to anchor patch [GT-15-patch-0.txt] to repository [PreCommit]: Crucible tried to anchor your patch to 'PreCommit', but did not find any matching revisions.
at com.atlassian.theplugin.commons.remoteapi.rest.AbstractHttpSession.buildExceptionText(AbstractHttpSession.java:625)
at com.atlassian.theplugin.commons.remoteapi.rest.AbstractHttpSession.retrievePostResponseInternalImpl(AbstractHttpSession.java:444)
at com.atlassian.theplugin.commons.remoteapi.rest.AbstractHttpSession.retrievePostResponseInternal(AbstractHttpSession.java:359)
at com.atlassian.theplugin.commons.remoteapi.rest.AbstractHttpSession.retrievePostResponse(AbstractHttpSession.java:350)
at com.atlassian.theplugin.commons.remoteapi.rest.AbstractHttpSession.retrievePostResponse(AbstractHttpSession.java:345)
at com.atlassian.theplugin.commons.remoteapi.rest.AbstractHttpSession.retrievePostResponse(AbstractHttpSession.java:338)
at com.atlassian.theplugin.commons.crucible.api.rest.CrucibleSessionImpl.createReviewFromPatch(CrucibleSessionImpl.java:1302)
at com.atlassian.theplugin.commons.crucible.CrucibleServerFacadeImpl.createReviewFromPatch(CrucibleServerFacadeImpl.java:381)
at com.atlassian.connector.intellij.crucible.IntelliJCrucibleServerFacade.createReviewFromPatch(IntelliJCrucibleServerFacade.java:241)
at com.atlassian.theplugin.idea.crucible.AbstractCrucibleCreatePreCommitReviewForm.createReviewImpl(AbstractCrucibleCreatePreCommitReviewForm.java:63)
at com.atlassian.theplugin.idea.crucible.CrucibleCreatePreCommitUploadReviewForm.createReview(CrucibleCreatePreCommitUploadReviewForm.java:76)
at com.atlassian.theplugin.idea.crucible.CrucibleReviewCreateForm$8.run(CrucibleReviewCreateForm.java:805)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$TaskRunnable.run(ProgressManagerImpl.java:464)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$2.run(ProgressManagerImpl.java:181)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:209)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.runProcess(ProgressManagerImpl.java:172)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$6.run(ProgressManagerImpl.java:340)
at com.intellij.openapi.application.impl.ApplicationImpl$6.run(ApplicationImpl.java:375)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
at com.intellij.openapi.application.impl.ApplicationImpl$1$1.run(ApplicationImpl.java:130)