# Error Symbol not found: \_OBJC\_CLASS\_$\_RTCAudioSink

**URL:** <https://community.sendbird.com/t/error-symbol-not-found-objc-class-rtcaudiosink/1377>\
**Category:** iOS\
**Tags:** sendbird-call\
**Created:** [December 4, 2020, 11:03pm UTC](https://community.sendbird.com/t/error-symbol-not-found-objc-class-rtcaudiosink/1377 "2020-12-04T23:03:03Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![pablo\_sanchez](https://sea2.discourse-cdn.com/flex020/user_avatar/community.sendbird.com/pablo_sanchez/32/711_2.png) [@pablo\_sanchez](https://community.sendbird.com/u/pablo_sanchez)\
**Post date:** [December 4, 2020, 11:03pm UTC](https://community.sendbird.com/t/error-symbol-not-found-objc-class-rtcaudiosink/1377/1 "2020-12-04T23:03:03Z")

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hi, I just followed all the steps for the integration of sendbirds to my app and I get the following error

Referenced from: /Users/editor/Library/Developer/CoreSimulator/Devices/A8922AB7-18EA-474D-9AA3-1ADF62C77C57/data/Containers/Bundle/Application/3CD49DC0-6320-4A73-BE38-EB52A72DE076/Condominio.app/Frameworks/SendBirdCalls.framework/SendBirdCalls  
Expected in: /Users/editor/Library/Developer/CoreSimulator/Devices/A8922AB7-18EA-474D-9AA3-1ADF62C77C57/data/Containers/Bundle/Application/3CD49DC0-6320-4A73-BE38-EB52A72DE076/Condominio.app/Frameworks/WebRTC.framework/WebRTC  
in /Users/editor/Library/Developer/CoreSimulator/Devices/A8922AB7-18EA-474D-9AA3-1ADF62C77C57/data/Containers/Bundle/Application/3CD49DC0-6320-4A73-BE38-EB52A72DE076/Condominio.app/Frameworks/SendBirdCalls.framework/SendBirdCalls

I also get the same error when trying to run the app on a real device

can helpme

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**Author:** ![mininny](https://sea2.discourse-cdn.com/flex020/user_avatar/community.sendbird.com/mininny/32/305_2.png) [@mininny](https://community.sendbird.com/u/mininny)\
**Post date:** [December 5, 2020, 12:46am UTC](https://community.sendbird.com/t/error-symbol-not-found-objc-class-rtcaudiosink/1377/2 "2020-12-05T00:46:16Z")

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Hi @pablo_sanchez,

Could you try again after updating `SendBirdWebRTC` to the latest version 1.2.0?

Thanks 🙂

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**Author:** ![hendychrst](https://sea2.discourse-cdn.com/flex020/user_avatar/community.sendbird.com/hendychrst/32/1449_2.png) [@hendychrst](https://community.sendbird.com/u/hendychrst)\
**Post date:** [July 30, 2021, 8:29am UTC](https://community.sendbird.com/t/error-symbol-not-found-objc-class-rtcaudiosink/1377/4 "2021-07-30T08:29:55Z")

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Dude… you might want to update the README section in the webrtc repository.

 ![Screen Shot 2021-07-30 at 15.28.03](https://us1.discourse-cdn.com/flex020/uploads/sendbird/original/2X/6/68773ef83d233a83f33f8106c62f65e08a356418.png)

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**Author:** ![mininny](https://sea2.discourse-cdn.com/flex020/user_avatar/community.sendbird.com/mininny/32/305_2.png) [@mininny](https://community.sendbird.com/u/mininny)\
**Post date:** [July 30, 2021, 8:40am UTC](https://community.sendbird.com/t/error-symbol-not-found-objc-class-rtcaudiosink/1377/5 "2021-07-30T08:40:02Z")

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Hi @hendychrst , Sorry for the inconvenience and thanks for letting us know!  
I just updated the README 🙂