# TypeError: Cannot read property 'senderGetCapabilities' of null, js engine: hermes

**URL:** <https://react-native-webrtc.discourse.group/t/typeerror-cannot-read-property-sendergetcapabilities-of-null-js-engine-hermes/1902>\
**Category:** General040642add70aa006ef56b5af5b5acae3\
**Created:** [November 25, 2023, 10:19am UTC](https://react-native-webrtc.discourse.group/t/typeerror-cannot-read-property-sendergetcapabilities-of-null-js-engine-hermes/1902 "2023-11-25T10:19:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Shahriar-H](https://yyz2.discourse-cdn.com/free1/user_avatar/react-native-webrtc.discourse.group/shahriar-h/32/777_2.png) [@Shahriar-H](https://react-native-webrtc.discourse.group/u/Shahriar-H)\
**Post date:** [November 25, 2023, 10:19am UTC](https://react-native-webrtc.discourse.group/t/typeerror-cannot-read-property-sendergetcapabilities-of-null-js-engine-hermes/1902/1 "2023-11-25T10:19:38Z")

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![image](https://global.discourse-cdn.com/free1/uploads/reactnativewebrtc1/original/1X/caa6351601a8bdd546eeee02bb25aebdbb9234a0.png)

I got this error on the expo project, tried all possible ways but did not get the fix

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**Author:** ![8BallBomBom](https://yyz2.discourse-cdn.com/free1/user_avatar/react-native-webrtc.discourse.group/8ballbombom/32/710_2.png) [@8BallBomBom](https://react-native-webrtc.discourse.group/u/8BallBomBom)\
**Post date:** [December 21, 2023, 2:17pm UTC](https://react-native-webrtc.discourse.group/t/typeerror-cannot-read-property-sendergetcapabilities-of-null-js-engine-hermes/1902/2 "2023-12-21T14:17:47Z")

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Seems to be a common issue recently.  
Can you provide more info?  
What dependencies are you using?  
What version of React Native are you using?  
Which platforms?