This happens when you don’t have Chromium in your computer yet.
Open your project folder, then go to /bin/debug. In it you’ll see the actual folder name you need to use.
That’s because the error message tells you to run “pwsh bin/Debug/netX/playwright.ps1 install”. So you can replace X with your actual folder name.
In addition, if you don’t have PowerShell, you’ll need to install it.