we didn’t find any error 500 in demo. we’d like to know where(on which page) you saw that! this is an add on, and as such all required things are mentioned in the description. documentation is not even given here, how did you find it incomplete!? documentation comes with the download folder.

Where’s the documentation for how to integrate the physical attendance machine with the software?

Where are screenshots for the addon?

Your video that supposedly explains how to install it is 30 seconds long and only shows you moving some folders with no context at all.