As far as the first error, I haven't had it yet.
For the second error, it is telling you that your database is missing a column in the character_ table. The groupid column is for allowing the player to be in a group. The database schema that comes with DR2 is missing that field. You just need to 'ALTER' the table to add it as an 'int'. If you don't know how to alter a table, go to
www.mysql.com and search their documentation for the ALTER TABLE command.
Hope that helps,
-Valdain