I don't know why 1.3 did not work with Taurine. I've recreated a release on a Taurine device, this time keeping only a single executable file. I also did not change any permissions before creating the deb. Theoretically, the application installed to /Applications is now identical to the iPA created from the Xcode project. This still doesn't work on Substitute based jailbreaks sadly, I have yet to figure out why.
Tested on iPhone 12 Pro (iOS 14.3 RC + Taurine) and iPad 5th Generation (iPadOS 14.3 + Checkra1n) Both work and can run through the entirety of vanilla DDLC without error.
1.4 is compatible with my DDLC-reniOS Mod Manager shortcut (DDLCRMM), which can be found here: https://routinehub.co/shortcut/9204/
You will need (jailbreak duh), unzip, and SSH configured to listen on port 2222. This can be set using [OpenSSH Settings], found on default repos. Before running DDLC, select 'Initialize DDLC' option in the mod manager to avoid traceback errors. Please also read its description if you want to know what the other functions do.