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Auth0Lock and iOS Safari

I’ve been struggling with Auth0Lock and iOS Safari.

I can’t login and just get “we’re sorry, something went wrong when attempting to log in”

My application is set as SPA, domain is added to allowed callback urls, allowed web origins and CORS. callback-cross-auth.html is hosted at https://{mydomain}/callback-cross-auth.html and this url is added to Advanced -> OAuth -> Cross-Origin Verification Fallback.

When I try to log in, iframe with “Unauthorized” in the body and after a while error will be shown.

I’m I missing some config or what could cause this issue?