# Critical error occured when trying to login in my thunkable app on other devices

**URL:** <https://community.thunkable.com/t/critical-error-occured-when-trying-to-login-in-my-thunkable-app-on-other-devices/1934293>\
**Category:** Questions about Thunkable X\
**Tags:** firebase, beginner, login, crash, auth\
**Created:** [June 21, 2022, 10:22am UTC](https://community.thunkable.com/t/critical-error-occured-when-trying-to-login-in-my-thunkable-app-on-other-devices/1934293 "2022-06-21T10:22:04Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jared](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/jared/32/138473_2.png) [@jared](https://community.thunkable.com/u/jared)\
**Post date:** [June 22, 2022, 1:30am UTC](https://community.thunkable.com/t/critical-error-occured-when-trying-to-login-in-my-thunkable-app-on-other-devices/1934293/2 "2022-06-22T01:30:12Z")

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Please check this out. Perhaps some debugging would be helpful.

[Debugging in Thunkable X (Video)](https://community.thunkable.com/t/debugging-in-thunkable-x-video/849471)

Does the app work when you preview in the app builder?

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_[View the full topic](https://community.thunkable.com/t/critical-error-occured-when-trying-to-login-in-my-thunkable-app-on-other-devices/1934293)._