[Beta1] Uncaught Exception in applications/core/dev/html/front/tables/rows.phtml

Hello,

When trying to display a Db table (location=front) I get the following Exception:

Error: Class name must be a valid object or a string (0)
#0 /home/bn2468/public_html/system/Theme/Dev/Template.php(151): IPS\Theme\theme_core_front_tables_rows()
#1 /home/bn2468/public_html/system/Theme/Theme.php(3678) : eval()'d code(527): IPS\Theme\Dev\Template->__call()
#2 /home/bn2468/public_html/system/Theme/Dev/Template.php(151): IPS\Theme\theme_core_front_tables_table()
#3 /home/bn2468/public_html/system/Helpers/Table/Table.php(606): IPS\Theme\Dev\Template->__call()
#4 /home/bn2468/public_html/applications/bntest/modules/front/john/reports.php(51): IPS\Helpers\Table\Table->__toString()
#5 /home/bn2468/public_html/system/Dispatcher/Controller.php(139): IPS\bntest\modules\front\john\reports->manage()
#6 /home/bn2468/public_html/applications/bntest/modules/front/john/reports.php(29): IPS\Dispatcher\Controller->execute()
#7 /home/bn2468/public_html/system/Dispatcher/Dispatcher.php(169): IPS\bntest\modules\front\john\reports->execute()
#8 /home/bn2468/public_html/index.php(16): IPS\Dispatcher->run()
#9 {main}

The code is pretty simple - it's a front module:

    protected function manage() : void
    {
        // ?app=bntest&module=john&controller=reports
        
        // generate the report
        $report = new \IPS\Helpers\Table\Db('bntest_test_reports', \IPS\Http\Url::internal('app=bntest&module=john&controller=reports'));
        $report->langPrefix = 'report_';
        $report->include = [
            'name',
            'location',
            'age',
        ];
        $report->title = 'Test Report';
        
        \IPS\Output::i()->output .= (string) $report;
    }
 

When I do the same with an admin module (which defaults to using applications/core/dev/html/admin/tables/rows.phtml) it works fine. My code is substantially the same (just has a different URL parameter):

    protected function manage() : void
    {
        // admin/?app=bntest&module=reports&controller=reports
        
        // generate the report
        $report = new \IPS\Helpers\Table\Db('bntest_test_reports', \IPS\Http\Url::internal('admin/app=bntest&module=reports&controller=reports'));
        $report->langPrefix = 'report_';
        $report->include = [
            'name',
            'location',
            'age',
        ];
        $report->title = 'Test Report';
        
        \IPS\Output::i()->output .= (string) $report;
    }
 

The report is trivial test data:

Thanks very much.

John