XF 2.3 Oops... Cookies are required for this site error

[rockymountainmotos]

I've installed 2 new xenforo 2.3.7 installations onto an existing xenforo 2.2 KnownHost shared professional server. The original forum doesn't display this error, but the 2 new installations do. They prevent people from signing up, posting, etc.

How to solve this? Thanks!

 

[Chromaniac]

might need to fix cookie prefix in the new installs?

Config.php options | Manual | XenForo

End-user documentation for XenForo

xenforo.com

though, this should not matter if the installs are on different domains.