Describe the bug
I encountered the following problem when I followed the build instructions in https://polaris.apache.org/in-dev/unreleased/quickstart/:

My execution order was:
- ./gradlew build
- ./gradlew runApp
I don't know if I missed any steps.
Looking forward to your reply.
To Reproduce
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Actual Behavior
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Expected Behavior
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Additional context
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System information
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