It looks as if a parameter has been added since the documentation was written (the CLUT format parameter needs to be there & isn't mentioned elsewhere, as far as I can see)
The script asks for the file that holds the preferences: which is copied to a new file, where it acts as the default instruction for the current & future runs.
PhotoScript/script/photo.sh at main · Linecutterx/PhotoScriptBash scripting for use of dcraw & Imagemagick in termux - for processing RAW photos - Linecutterx/PhotoScriptGitHubLinecutterx
First, you have to edit the script. Mainly