Gradle plugin failure, not enough information.

[stosik]

SonarQube: 6.7.1 sonarqube-gradle-plugin: 2.6.2 Gradle: 4.5.1 GitLab Community Edition 9.0.0

I run on gitlab ci task as follows:

testBranch: stage: test_preview script:

• git config --global user.email "$GIT_USER_EMAIL"
• git config --global user.name "$GIT_USER_NAME"
• git checkout origin/master
• git merge $CI_COMMIT_SHA --no-commit --no-ff
• chmod +x gradlew
• ./gradlew check jacocoTestReport sonarqube -Dsonar.host.url=$SONAR_HOST_URL -Dsonar.analysis.mode=preview -Dsonar.gitlab.project_id=$CI_PROJECT_PATH -Dsonar.gitlab.commit_sha=$CI_COMMIT_SHA -Dsonar.gitlab.ref_name=$CI_COMMIT_REF_NAME

and get following error:

Failed to execute project builder: com.talanlabs.sonar.plugins.gitlab.CommitProjectBuilder`

Is there anything what possibly I could do wrong ? Sorry for creating issue for it but couldn't find any answer in already closed ones.