# SHELLY - Error: Cannot read properties of null (reading '0')

**URL:** <https://community.homey.app/t/shelly-error-cannot-read-properties-of-null-reading-0/64243>\
**Category:** Devices\
**Tags:** app\
**Created:** [May 31, 2022, 12:20pm UTC](https://community.homey.app/t/shelly-error-cannot-read-properties-of-null-reading-0/64243 "2022-05-31T12:20:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![PHEM\_van\_Oostrom](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/phem_van_oostrom/32/3814_2.png) [@PHEM\_van\_Oostrom](https://community.homey.app/u/PHEM_van_Oostrom)\
**Post date:** [May 31, 2022, 12:20pm UTC](https://community.homey.app/t/shelly-error-cannot-read-properties-of-null-reading-0/64243/1 "2022-05-31T12:20:01Z")

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Shelly app

When i try to add a motion sersor i get the following error message,

Error: Cannot read properties of null (reading ‘0’)

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**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\
**Post date:** [May 31, 2022, 12:23pm UTC](https://community.homey.app/t/shelly-error-cannot-read-properties-of-null-reading-0/64243/2 "2022-05-31T12:23:19Z")

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Follow [the official thread](https://community.homey.app/t/app-pro-cloud-shelly/765/2826).

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**Author:** ![Dijker](https://avatars.discourse-cdn.com/v4/letter/d/b9bd4f/32.png) [@Dijker](https://community.homey.app/u/Dijker)\
**Post date:** [May 31, 2022, 8:32pm UTC](https://community.homey.app/t/shelly-error-cannot-read-properties-of-null-reading-0/64243/3 "2022-05-31T20:32:05Z")

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