Administrator of this Mac Disabled Your User Account from Accessing USB Network Gate
Assuming that you are an admin on this Mac it may be that your app security settings need to be either relaxed or for you to give that app permission to install.

Go to System Preferences > Security > General and click on the lock icon and authenticate. That app might be listed for you to explicitly give it permission to run. If not make sure that "Allow Apps downloaded from: app store and identified developers" is selected.

You might also want to ask the developer if they have seen this behavior and what their specific solution is.