After upgrade, cannot allow Hypervisor Extension

Parallels just updated to Version 18.2.0 (53488). On Parallels Resume or Start, a popup says "To start...you need to allow the Parallels Hypervisor System Extension." I click on Open Security Preferences, Security & Privacy opens, but there's no app to approve (see attachment). Restarting iMac and Parallels returns the same results. Please advise how to proceed.

 

As you can see in the attachment, the message "System software from developer 'Parallels International GmbH' was blocked from loading" never appears, so the KB article doesn't apply

 

Hello @DennisP3, could you please uninstall the Parallels Desktop for Mac app > restart the Mac > and then install the Parallels Desktop application and check. thanks.

 

No luck. Same symptoms as before. Security & Privacy > General does not show the message "System software from developer 'Parallels International GmbH' was blocked from loading" doesn't appear when Parallels Hypervisor is enabled. The VM stops at the security message on start.