When I upgraded zabbix from 3.0 to 4.0, the following error occurred in the web panel, please help me to solve it, thank you.

• Error in query [SELECT d.dashboardid,d.name FROM dashboard d LIMIT 1001] [Table 'zabbix.dashboard' doesn't exist]
• Undefined index: custom_color [zabbix.php:21 → require_once() → ZBase->run() → ZBase->processRequest() → CView->getOutput() → include() → local_generateHeader() → CView->getOutput() → include() → getTriggerStatusCss() in include/html.inc.php:990]