Hi,

Upgraded from Latest 5.2 to 5.5 RC1.

When I go to Admin > Studio > Any Module > Relationships i get message " Failed to retrieve data..."

The impact of this extends to Sub Panels, which are not shown in detail view...

Any ideas will be appreciated.

No real issues found in .log, most interesting log is:

[DEBUG] SubPanelDefinitions->get_available_tabs(): no module defined in subpaneldefs for 'accounts_accbr_branch_office' =>array (
'override_subpanel_name' => 'Accountdefault'