I tested this Plugin with a WP Multisite, installed it by searching in the Admin Network Dashboard for the Plugin and installing it from there.
Strangely there was no Folder created for it inside the Plugins folder. It still worked after Network activation and I created a Dongle for each page.
Problem: For one page I couldn’t log in, for some reason it didn’t work, might have been me making a mistake when setting it up.
The official solution for this case is to go to your Plugins Folder and modify a file but since no Folder was created in there and I couldn’t find the file, I had to log in to the Network Dashboard through the main Site’s Login Box and Disable, then Delete it from there. I don’t know where the actual folder was.
I had luck, that it wasn’t the Main Site I was unable to login to. For this reason I recommend installing it manually by uploading the files, don’t use the search box inside WP.