Dashboard throws an error at benchmark

Hello,
Thanks for creating a readable dashboard that help me a lot to understand what is going on in the cache server.
However, is looks like some recent change broke it, there are steps that I did.

Steps:

1. Run bench server : RUST_LOG=info cargo run --release --bin bench_server
2. Click on the Dashboard link https://liquid-cache-admin.xiangpeng.systems/?host=http://127.0.0.1:53703 , It is up

3. Run the queries env RUST_LOG=info,clickbench_client=debug RUSTFLAGS='-C target-cpu=native' cargo run --release --bin tpch_client -- --manifest /Users/xxxx/Truata/playground/liquid-cache/benchmark/tpch/manifest.json
4. See the error

5. Validate the admin server response:

In case you don't prioritize the dashboard, can you please provide some way to export all the data into a parquet file and I will build my charts with this data.

Thanks again for the effort to put into this project.
Leon

Reproduce the issue with the documented bench_server and tpch_client commands, then open the dashboard URL and validate the admin server response as shown. Compare the dashboard failure with the response during the benchmark; done means the dashboard no longer errors while those queries run, or the requested data export path is clearly provided.