A cookie associated with a cross-site resource at {Domain Name} was set without the SameSite attribute

Your software
My Mautic version is: 3.01
My PHP version is: 7.3

Your problem
My problem is: A cookie associated with a cross-site resource at {Domain Name} was set without the SameSite attribute.

Here is the complete message we are seeing in chrome. There are similar messages in Edge and Firefox as well…

A cookie associated with a cross-site resource at {Domain Name} was set without the SameSite attribute. A future release of Chrome will only deliver cookies with cross-site requests if they are set with SameSite=None and Secure. You can review cookies in developer tools under Application>Storage>Cookies and see more details at https://www.chromestatus.com/feature/5088147346030592 and https://www.chromestatus.com/feature/5633521622188032.

I know that there are some similar posts in the community, but after reading through them I can’t tell if this is a issue in mautic 3.01 running apache.

For some context, we are running Mautic under cPanel as we plan on setting up several instances of Mautic for our clients at some point in the future. Our Mautic and site are on different domains - i.e.

http://mysite.mymautic.io (mautic)
http://mysite.com (website with tracking)

I have CORS turned on and added http://mysite.com and http://www.mysite.com. We have not added the SSL yet since these are just test sites for now. We are not sure if the issue is related to the Mautic cookies or the lack of SSL on the Mautic / Test websites.

Any advice is greatly appreciated!