# Newly created device throws "Error: Parameter "key" required" when clicked

**URL:** <https://community.cumulocity.com/t/newly-created-device-throws-error-parameter-key-required-when-clicked/1214>\
**Category:** Forum\
**Tags:** cumulocity\
**Created:** [July 3, 2024, 1:11pm UTC](https://community.cumulocity.com/t/newly-created-device-throws-error-parameter-key-required-when-clicked/1214 "2024-07-03T13:11:25Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![dacsystemsw](https://avatars.discourse-cdn.com/v4/letter/d/e79b87/32.png) [@dacsystemsw](https://community.cumulocity.com/u/dacsystemsw)\
**Post date:** [July 3, 2024, 1:11pm UTC](https://community.cumulocity.com/t/newly-created-device-throws-error-parameter-key-required-when-clicked/1214/1 "2024-07-03T13:11:25Z")

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#### _ **Product/components** used and **version/fix** level:_

Cumulocity IoT  
Backend: **1020.296.0**  
UI: **1011.0.4**

#### _Detailed explanation of the problem:_

Hi,  
we have a custom application based on Cockpit. To comunicate with our tenant we use the Java agent provided by you.

After we register a device on the platform we try to visualize it on our application but we get the following error:

```auto
Error: Parameter "key" required
    at A.instant (vendors~app.ed04ce34587520af21d2.js:3179:7239)
    at vendors~app.ed04ce34587520af21d2.js:1939:201107
    at Array.sort (<anonymous>)
    at Bt.sortTabs (vendors~app.ed04ce34587520af21d2.js:1939:201030)
    at Bt.prepareTabs (vendors~app.ed04ce34587520af21d2.js:1939:200831)
    at t.project (vendors~app.ed04ce34587520af21d2.js:1939:200582)
    at t._next (vendors~app.ed04ce34587520af21d2.js:3627:74858)
    at t.next (vendors~app.ed04ce34587520af21d2.js:2392:1092)
    at t.notifyNext (vendors~app.ed04ce34587520af21d2.js:7060:266787)
    at t._next (vendors~app.ed04ce34587520af21d2.js:3349:16029)

```

 ![image](https://europe1.discourse-cdn.com/flex005/uploads/cumulocity/original/3X/2/6/26067cbe06d13f2b2583090dc35feb21697d7192.png)

This problem never happend before as we installed hundreds of devices.

#### _Error messages / **full error** message screenshot / **log** file:_

#### _Question related to a **free trial** , or to a **production (customer)** instance?_

customer

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<div class="post-metadata">

**Author:** ![Robert\_Neale](https://dub1.discourse-cdn.com/flex005/user_avatar/community.cumulocity.com/robert_neale/32/31965_2.png) [@Robert\_Neale](https://community.cumulocity.com/u/Robert_Neale)\
**Post date:** [July 3, 2024, 2:04pm UTC](https://community.cumulocity.com/t/newly-created-device-throws-error-parameter-key-required-when-clicked/1214/2 "2024-07-03T14:04:09Z")

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This is being handled as a support ticket.

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<div class="post-metadata">

**Author:** ![system](https://dub1.discourse-cdn.com/flex005/user_avatar/community.cumulocity.com/system/32/31990_2.png) [@system](https://community.cumulocity.com/u/system)\
**Post date:** [December 24, 2024, 12:02am UTC](https://community.cumulocity.com/t/newly-created-device-throws-error-parameter-key-required-when-clicked/1214/3 "2024-12-24T00:02:41Z")

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<div class="post-metadata">

**Author:** ![system](https://dub1.discourse-cdn.com/flex005/user_avatar/community.cumulocity.com/system/32/31990_2.png) [@system](https://community.cumulocity.com/u/system)\
**Post date:** [June 22, 2025, 12:03am UTC](https://community.cumulocity.com/t/newly-created-device-throws-error-parameter-key-required-when-clicked/1214/4 "2025-06-22T00:03:39Z")

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