v4.0.0 dashboard diagnose report error

[Win-Man]

Bug Report

Please answer these questions before submitting your issue. Thanks!

What did you do?

部署 4.0.0 版本集群，通过 dashbaord 生成性能诊断报告，发现报告最下面有错误

What did you expect to see?

What did you see instead?

What version of TiDB Dashboard are you using (./tidb-dashboard --version)?

[breezewish]

@crazycs520 Is this problem resolved now?

[crazycs520]

No, Still in cherry-pick PR

[breezewish]

@crazycs520 Could you reference the PR here so that we can track the progress?

[crazycs520]

Need pick pingcap/tidb#15589 to release 4.0

But should wait pingcap/tidb#17671 (cherry-pick #15985) first.