propogationpolicy page in loading state

[warjiang]

What happened:
When navigating to propogationpolicy page, the page will in loading state for a long time, I found that the list propogationpolicies api is in 500 state:

What you expected to happen:
The propogationpolicy page can show the list of propogationpolicies.

How to reproduce it (as minimally and precisely as possible):
When navigating to propogationpolicy page, and then open the chrome devtools, switch to Network tab.

Anything else we need to know?:

Environment:

• Karmada version: v0.2.0
• Karmada Dashboard version: latest
• Others:

[warjiang]

cc @SunsetB612

[warjiang]

It has some relationships with PR #266

[warjiang]

/close
as PR #293 finished

[karmada-bot]

@warjiang: Closing this issue.

In response to this:

/close
as PR#293 finished

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