Apple just released the highly anticipated macOS Monterey 12.
Your Parallels Desktop 15 for Mac is two versions behind and does not officially support the new macOS release, Monterey 12.
Please check this Knowledgebase Article for known compatibility issues prior to upgrading to macOS Monterey.
In order to use Parallels Desktop and be fully compatible and optimized for macOS Monterey, you’ll need to upgrade to our latest version, Parallels Desktop 17. This version delivers better graphics performance, faster Windows resume time and dozens of productivity improvements over version 15.
As a loyal user, you are eligible to upgrade to a more powerful Parallels Desktop Pro Edition at a 50% discount for just $49.99/year (normally $99.99/year).