Forum .LRN Q&A: Re: Photo-Album 6.2.3 2.6.0 & dotlrn 2.6.0 Installed and trying to upload produced an error message
couldn't execute "/usr/bin/identify": no such file or directoryis coming from Linux and means that you do not have the ImageMagick package installed.
The following command installs it under Debian/Ubuntu
sudo apt install imagemagick
photo-album is not included in the 97 supported packages for OpenACS 5.10.