Errors after upgrade

[Ronald_1938]

Logged out, requested new password, received the email, clicked on the link, enter two new passwords the same, got two green check marks.

Clicked save. 

Got this: An error has occurred
Invalid activation code

[Sir Osis of Liver]

Password reset works for me.  Try changing cookie name in Server Settings, that will log everyone out and force clean cookie for all members.

[Ronald_1938]

Password reset works for me.  Try changing cookie name in Server Settings, that will log everyone out and force clean cookie for all members.

Change the last digit of the cookie name. Will see what happens now.