# Invalid\_grant trying to add l510 bulb to TAPO official app

**URL:** https://community.homey.app/t/invalid-grant-trying-to-add-l510-bulb-to-tapo-official-app/157165
**Category:** Questions & Help
**Created:** [July 13, 2026, 5:20pm UTC](https://community.homey.app/t/invalid-grant-trying-to-add-l510-bulb-to-tapo-official-app/157165 "2026-07-13T17:20:17Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Stephen\_Petitt](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/stephen_petitt/32/121620_2.png) [@Stephen\_Petitt](https://community.homey.app/u/Stephen_Petitt)
#### Post date: [July 13, 2026, 5:20pm UTC](https://community.homey.app/t/invalid-grant-trying-to-add-l510-bulb-to-tapo-official-app/157165/1 "2026-07-13T17:20:17Z")

</div>

Hi

I’m getting an “Invalid\_grant” trying to add an L510 bulb to the TAPO official app.

I’ve tried using the Web app and the Android version; both give the error. I’ve tried at various times, as I’ve seen some comments about TAPO’s servers being overloaded.

Just to add, I get the same error when adding a power plug

I’m running v2.1.16 of the TAPO app on a Homey Self-Hosted Server.

Thanks

Stephen