Likely a firewall issue - we communicate with the game client via your network card, so the likelihood is that the socket is being blocked. Make sure you're running both RM and RS as admin.
same issue as OP. I'm on windows and I have uninstalled Java and installed the 32xbit version. I just ran as administrator and green spinner has been loading nonstop for like 5 minutes now.
Hope this gets fixed, I just bought credit today and it's my first time trying to use RM.
edit:
restarted RM as administrator and I'm back to the same issue from the beginning.
[Debug] Java Home: c:\program files (x86)\runemate\jre
[Debug] Java Version: 8u121 x86 (Oracle Corporation)
[Debug] Maximum Heap Size: 743MB
[Debug] RuneMate Version: 2.49.2
[Debug] Operating System: Windows 10 x64
[Web Services] Connection authorized.
Failed to bind to the game client because of an AgentInitializationException
com.sun.tools.attach.AgentInitializationException: Agent JAR loaded but agent failed to initialize
at sun.tools.attach.HotSpotVirtualMachine.loadAgent(hs:197)
at nul.iIIiiiiIIiiIi.do(yac:6)
at nul.IIIIIiiIIiIII.run(uzb:30)
plz help lol really trying to get this new zerk some xp gains