Safari cross-domain cookie issue

[aehnh]

Describe the bug
Safari does not send cbo_long_session cookie on local playground react (uncaught runtime error at logged-in page)

To Reproduce
Steps to reproduce the behavior:

1. Start Playground React on localhost (safari or mobile safari)
2. Create account
3. Completing the signup, the final page (logged-in) should display an uncaught runtime error
4. If the error is not displayed, try logging out and logging back in with the same account

Expected behavior
Uncaught runtime error should not occur

Screenshots

Additional context
Vercel works fine. The only problem is on local deployment. This implies that there is an issue in Safari with cross-domain cookies