All does not seem well, post upgrade.
On a system which has no prior login in browser cache:
APPLICATION ERROR #401
Database query failed. Error received from database was #1146: Table 'c2_mantis_6932.mantis_category_table' doesn't exist for the query: SELECT c.*, p.name AS project_name FROM mantis_category_table AS c
LEFT JOIN mantis_project_table AS p
ON c.project_id=p.id
WHERE project_id=0
ORDER BY c.name .
On my usual system, which has a prior login cookie in the browser cache:
APPLICATION ERROR #401
Database query failed. Error received from database was #1054: Unknown column 'p.inherit_global' in 'field list' for the query: SELECT DISTINCT p.id, ph.parent_id, p.name, p.inherit_global, ph.inherit_parent
FROM mantis_project_table p
LEFT JOIN mantis_project_hierarchy_table ph
ON ph.child_id = p.id
WHERE p.enabled = ?
ORDER BY p.name.