This error will haunt any person trying to upgrade from an old install (e.g. 5.1.5), which does include a couple thousand ]project-open[ installations.
As the script is not needed as it was duplicated in later installs, would it be possible to either remove or fix it in a way which does not break upgrades? That would be awesome, as it is hard to tell people "download the source code, remove the following files and then do the upgrade" 😊.
Obviously ]project-open[ could just provide the whole OpenACS core internally as it used to do so far, but my goal is to make sure, you can install ]project-open[ with the latest release OpenACS and the OpenACS released files from the OpenACS repository :).