# Callback URL Fails

**URL:** <https://community.auth0.com/t/callback-url-fails/8233>\
**Category:** Get Help\
**Tags:** react-native, callback-urls\
**Created:** [September 19, 2017, 12:37am UTC](https://community.auth0.com/t/callback-url-fails/8233 "2017-09-19T00:37:01Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![rhodesdav](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/rhodesdav/32/7280_2.png) [@rhodesdav](https://community.auth0.com/u/rhodesdav)\
**Post date:** [September 19, 2017, 12:37am UTC](https://community.auth0.com/t/callback-url-fails/8233/1 "2017-09-19T00:37:01Z")

</div>

When entering this into “allowed callback URLS”:

dancecomp-rn://dance-comp.auth0.com/ios/dancecomp-rn/callback,  
dancecomp-rna://dance-comp.auth0.com/android/dancecomp-rna/callback

I get this error:

> Payload validation error: 'Object  
> didn’t pass validation for format url:  
> ’ on property cross\_origin\_loc (Url fo  
> the location in your site where the  
> cross origin verification takes place  
> for the cross-origin auth flow when  
> performing Auth in your own domain  
> instead of Auth0 hosted login page).

I am following the exact directions from the tutorial but missing something as a newb. Help?

Thanks,  
D

---

<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/auth0/original/3X/b/5/b560f266932fcce5d57f09a6595bd50518cae3f3.jpeg) [@system](https://community.auth0.com/u/system)\
**Post date:** [March 2, 2018, 5:56am UTC](https://community.auth0.com/t/callback-url-fails/8233/2 "2018-03-02T05:56:34Z")

</div>