After enabling CCP v2 for an account, if an old APS 2 application without CCP v2 support is present on a subscription, there is a menu item drawn in CCP v2, but pressing it puts you back on the Home page.
In pui.log we could see the following excception during page load:
01:44:51.658 [default task-75] WARN c.p.p.c.c.a.m.a.c.NextCPIntegrationHandler - Navigation to menu failed java.lang.IllegalStateException: MenuItem root is selected instead of cl_saas_customui_application841 at com.plesk.p2.cp.core.aps.modules.actions.clientcp.NextCPIntegrationHandler.ensureExpectedMenuItem(NextCPIntegrationHandler.java:91) at com.plesk.p2.cp.core.aps.modules.actions.clientcp.NextCPIntegrationHandler.doMenu(NextCPIntegrationHandler.java:110)
The behavior is recognized as a software issue APS-45105: aps2 legacy application is shown in CCPv2 left menu although it does not have ui/service navigation
There is no workaround, such menu items cannot be disabled.
Contact TAM or PTA (email@example.com) to request a fix for the issue.