Unleash: unable to fetch feature toggles TypeError: Cannot read properties of undefined (reading 'find')

[mavericardo]

Describe the bug

I'm trying to check my feature toggle using the hook useFlag from @unleash/proxy-client-react But I'm getting the following error within library:

Steps to reproduce the bug

1. Makes the simple configuration
2. Try uses the useFlag() hook

Expected behavior

Returns my feature flag information.

Logs, error output, etc.

No response

Screenshots

No response

Additional context

No response

Unleash version

"@unleash/proxy-client-react": "^3.6.0" - "unleash-proxy-client": "^2.5.0"

Subscription type

None

Hosting type

None

SDK information (language and version)

React

[mltsy]

Could you post your code for setting up the client and/or FlagProvider config?

I've gotten a similar error to this and it was because I didn't have the URL specified correctly. The error looks a bit like the toggles were never returned from the server (making toggles undefined), which could indicate an error in your configuration. 🤔

[FredrikOseberg]

@mavericardo Thanks for the report. Could you provide a reproducable example here? I suspect there may be a configuration issue, even though the error message looks scary. I'd like to get to the bottom of this, so any information you could give me would be appreciated!

In particular I'm interested in:

• Are you using any kind of bootstrapping mechanism? If so, what does the data look like.
• Which URL are you configuring the client to hit to retrieve data. What does the data look like coming back from the API?

It looks to me like the client is configured with an URL that responds with data that does not match the schema.

[FredrikOseberg]

Closing this for now. Feel free to re-open with new information.