There is a new google chrome update that is rejecting cookies with the following message:
This Set-Cookie was blocked because it had the “SameSite=None” attribute but did not have the “Secure” attribute, which is required in order to use “SameSite=None”.
You can see further information here: https://discuss.openedx.org/t/lti-xblock-and-samesite/759/15
Pull request were referenced there.
In the meanwhile I fixed the problem adding:
DCS_SESSION_COOKIE_SAMESITE = 'Lax'
In env/apps/openedx/settings/lms/production.py and env/apps/openedx/settings/cms/production.py