To check whether an error in one of my projects is not due to an outdated version of cabbage, I ran Cabbage64Setup-2.9.226.exe. After that Cabbage did not start. In the same Installers.zip there was also Cabbage64Setup-2.9.216.exe and this one works.
Sorry to add a second issue in the same post: How do I reliably determine whether the csound version Cabbage uses is up to date? I checked to install 6.17 during the Cabbage install, but if I type csound from the Windowscommand line I see 6.16.