Group Heal isn't working on multiplayer servers. Had it loaded up on a Master Healer Wand and when activating during a battle with myself and other players missing hearts, it did nothing. Not even an animation.

Minecraft version: 1.12.2
Forge version: 14.23.4.2759
Wizardry version: 4.1.2
Environment: SMP hosted server

Sorry, I added everyone as an ally and now it's working.

Did you make sure the other players were your allies? Either way, it should still heal you. I'll look into it, thanks for reporting.