# GroupChannel.buildFromSerializedData is broken on sendbird JavaScript SDK version 3.0.143

**URL:** <https://community.sendbird.com/t/groupchannel-buildfromserializeddata-is-broken-on-sendbird-javascript-sdk-version-3-0-143/1703>\
**Category:** JavaScript\
**Tags:** react-js, chatsdk\
**Created:** [February 12, 2021, 6:17am UTC](https://community.sendbird.com/t/groupchannel-buildfromserializeddata-is-broken-on-sendbird-javascript-sdk-version-3-0-143/1703 "2021-02-12T06:17:55Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Jonathan\_Xu](https://sea2.discourse-cdn.com/flex020/user_avatar/community.sendbird.com/jonathan_xu/32/964_2.png) [@Jonathan\_Xu](https://community.sendbird.com/u/Jonathan_Xu)\
**Post date:** [February 12, 2021, 6:17am UTC](https://community.sendbird.com/t/groupchannel-buildfromserializeddata-is-broken-on-sendbird-javascript-sdk-version-3-0-143/1703/1 "2021-02-12T06:17:55Z")

</div>

I’m attempting to persist SendBird Group Channels to redux store which requires the objects to be serializable.

I’ve created a test function which simply serializes, and immediately deserializes a Group Channel

```auto
  const x = channel.serialize();
  console.log(sb.GroupChannel.buildFromSerializedData(x));

```

Running this throws the following error

```auto
TypeError: Object is not a constructor (evaluating 'new i')]
- node_modules/sendbird/SendBird.min.js:6:205050 in value

```

It’s unbelievable that this isn’t automatically tested as part of each release, and it doesn’t help that the github/npm source only contains minified JavaScript, so I can’t even help identify root cause. This is a technical deal blocker for our team use the SendBird platform.

---

<div class="post-metadata">

**Author:** ![walter.rodriguez](https://sea2.discourse-cdn.com/flex020/user_avatar/community.sendbird.com/walter.rodriguez/32/546_2.png) [@walter.rodriguez](https://community.sendbird.com/u/walter.rodriguez)\
**Post date:** [February 12, 2021, 10:45am UTC](https://community.sendbird.com/t/groupchannel-buildfromserializeddata-is-broken-on-sendbird-javascript-sdk-version-3-0-143/1703/2 "2021-02-12T10:45:57Z")

</div>

Sorry to see this happening. I will create a report to check this issue and get back to you ASAP.

---

<div class="post-metadata">

**Author:** ![walter.rodriguez](https://sea2.discourse-cdn.com/flex020/user_avatar/community.sendbird.com/walter.rodriguez/32/546_2.png) [@walter.rodriguez](https://community.sendbird.com/u/walter.rodriguez)\
**Post date:** [February 19, 2021, 11:46am UTC](https://community.sendbird.com/t/groupchannel-buildfromserializeddata-is-broken-on-sendbird-javascript-sdk-version-3-0-143/1703/3 "2021-02-19T11:46:41Z")

</div>

Please, check this fix our team just released. It should solve this issue:

> **[Release v3.0.144 · sendbird/SendBird-SDK-JavaScript](https://github.com/sendbird/SendBird-SDK-JavaScript/releases/tag/v3.0.144)**
>
> tag/v3.0.144

Thanks for reporting errors and and sorry again for the inconvenience.

---

<div class="post-metadata">

**Author:** ![Jonathan\_Xu](https://sea2.discourse-cdn.com/flex020/user_avatar/community.sendbird.com/jonathan_xu/32/964_2.png) [@Jonathan\_Xu](https://community.sendbird.com/u/Jonathan_Xu)\
**Post date:** [February 20, 2021, 2:30am UTC](https://community.sendbird.com/t/groupchannel-buildfromserializeddata-is-broken-on-sendbird-javascript-sdk-version-3-0-143/1703/4 "2021-02-20T02:30:45Z")

</div>

Thanks Walter, just tested it in our application and deserialization is working!