Launch Agent Not Starting - macos

Question

I’m trying to make a launch agent that starts a Python script. It should run when there’s a network connection but it doesn’t do that. launchctl list says it’s loaded:
launchctl list | grep test.Flopsey.DiscordMusicBot
- 0 test.Flopsey.DiscordMusicBot
When I start it with launchctl start test.Flopsey.DiscordMusicBot it works fine. The .plist file (which is stored under ~/Library/LaunchAgents) looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>test.Flopsey.DiscordMusicBot</string>
<key>ProgramArguments</key>
<array>
<string>/Library/Frameworks/Python.framework/Versions/3.5/bin/python3.5</string>
<string>/path/to/MusicBot/run.py</string>
</array>
<key>EnvironmentVariables</key>
<dict>
<key>PATH</key>
<string>/bin:/usr/bin:/usr/local/bin</string>
</dict>
<key>StandardOutPath</key>
<string>/path/to/MusicBot/log.log</string>
<key>StandardErrorPath</key>
<string>/path/to/MusicBot/log.log</string>
<key>WorkingDirectory</key>
<string>/path/to/MusicBot</string>
<key>KeepAlive</key>
<dict>
<key>NetworkState</key>
<true/>
</dict>
</dict>
</plist>
I’m new to launchd and I followed this tutorial. I think the solution to my problem is very basic but I have no idea what it could be. I’ve also made another similar agent and it works fine (unlike the music bot it’s only one file).
Update
Thanks to #LCC’s comment I realised that using NetworkState doesn’t work anymore on OS X 10.10 and higher. Since the script exits when it can’t connect to the Internet I can just set KeepAlive to <true/> and set up a ThrottleInterval so launchd restarts the script after a cooldown if it couldn’t connect.