It looks like the CSP header for studio.apollographql.com has a typo, which breaks the login features on the embed.
The error is
Refused to frame 'https://studio.apollographql.com/' because an ancestor violates the following Content Security Policy directive: "frame-ancestors sandbox.embed.apollograpql.com embeddable-sandbox.netlify.app".
this shows
sandbox.embed.apollograpql.com
when it should be
sandbox.embed.apollographql.com
It looks like the CSP header for studio.apollographql.com has a typo, which breaks the login features on the embed.
The error is
this shows
sandbox.embed.apollograpql.comwhen it should be
sandbox.embed.apollographql.com