Callback URL Fails

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