Simply prints "Could not give item foo to user." User has permissions. User's groups have permissions. Simply unloading the extension brings back the native give commands. Loading Give breaks it.

No errors hanging out in logs that I can see.

I would need details on what exactly you are using. Exact command usage, etc.

Having the same issue starting with v3.2.0 and v3.2.1 (v3.1.0 works). I cannot give myself items. 
I had the following error when trying to F1 give.
Tried v3.2.1 and no error is provided when using F1.

Failed to call hook 'GiveToCommand' on plugin 'Give v3.2.0' (IndexOutOfRangeException: Index was outside the bounds of the array.)
  at Oxide.Plugins.Give.GiveToCommand (Oxide.Core.Libraries.Covalence.IPlayer player, System.String command, System.String[] args) [0x0007c] in <e8cd09043e9c4d0dad27b0adfdf4ece2>:0                                      570b/s in, 878b/s out
  at Oxide.Plugins.Give.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00212] in <e8cd09043e9c4d0dad27b0adfdf4ece2>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <80b90e8213db44b29ec2d4111764172c>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <ec05e0208c9149bba43236ca58fea105>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <ec05e0208c9149bba43236ca58fea105>:0​

beerock

Having the same issue starting with v3.2.0 and v3.2.1 (v3.1.0 works). I cannot give myself items. 
I had the following error when trying to F1 give.
Tried v3.2.1 and no error is provided when using F1.

Failed to call hook 'GiveToCommand' on plugin 'Give v3.2.0' (IndexOutOfRangeException: Index was outside the bounds of the array.)
  at Oxide.Plugins.Give.GiveToCommand (Oxide.Core.Libraries.Covalence.IPlayer player, System.String command, System.String[] args) [0x0007c] in <e8cd09043e9c4d0dad27b0adfdf4ece2>:0                                      570b/s in, 878b/s out
  at Oxide.Plugins.Give.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00212] in <e8cd09043e9c4d0dad27b0adfdf4ece2>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <80b90e8213db44b29ec2d4111764172c>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <ec05e0208c9149bba43236ca58fea105>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <ec05e0208c9149bba43236ca58fea105>:0​

Same for me doesn't seem to work anymore.

Found the issue... a silly one at that! Will push an update shortly, sorry guys.

Thanks, Wulf!