Hello everyone. So for some reason on my 1.13.2 server group manager doesn't want to install itself I click on the install button and it shows the checkmark meaning that it has successfully been installed but when I go into the plugins folder Group manager is not there. Its weird because all the other plugins work fine and I have tried it on my 1.15.2 server and it also doesn't work. This is the group manager im trying to install: https://aternos.org/addons/a/spigot/38875
Hope somebody responds