NullReferenceException at UI.LoadImageError
Here is the error from Rcon:
Failed to call hook 'cmdUI_AG_VIP' on plugin 'AbsolutGifts v1.4.4' (NullReferenceException: Object reference not set to an instance of an object) at Oxide.Plugins.AbsolutGifts+UI.LoadImage (Oxide.Game.Rust.Cui.CuiElementContainer& container, System.String panel, System.String img, System.String aMin, System.String aMax) [0x00000] in <09b14e634be34ef9a09f2219dde72dd1>:0 at Oxide.Plugins.AbsolutGifts.CreateGifts (BasePlayer player, System.Int32 step) [0x00926] in <09b14e634be34ef9a09f2219dde72dd1>:0 at Oxide.Plugins.AbsolutGifts.cmdUI_AG_VIP (ConsoleSystem+Arg arg) [0x00081] in <09b14e634be34ef9a09f2219dde72dd1>:0 at Oxide.Plugins.AbsolutGifts.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00ebe] in <09b14e634be34ef9a09f2219dde72dd1>:0 at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9affce1cd15c4ec183941adef8db1722>:0 at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <4452f821def6406d834e4149849fe7ea>:0 at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0 ​
Looks like an issue related to images. Make sure Imagelibrary is up to date. You can also try to refresh the AG data as a try. 
I have updated Imagelibrary before and the same error happens. the Window pops up I got to create, do the min, hit no VIP and it just dies after that. Logfile shows everything has loaded fine no error on startup. 
I take that back looks like an here:

Image failed to download! Error: Cannot resolve destination host - Image Name: first_2159 - Image URL: http://cdn.mysitemyway.com/etc-mysitemyway/icons/legacy-previews/icons/simple-black-square-icons-arrows/126517-simple-black-square-icon-arrows-double-arrowhead-left.png

Image failed to download! Error: Cannot resolve destination host - Image Name: last_2159 - Image URL: http://cdn.mysitemyway.com/etc-mysitemyway/icons/legacy-previews/icons/matte-white-square-icons-arrows/124577-matte-white-square-icon-arrows-double-arrowhead-right.png

Ok I'll get an update out as soon as possible. Thanks 
Reinstalled with updated Image Libaribly and the new 1.5 gifts, but still getting:
Failed to call hook 'cmdUI_AG_VIP' on plugin 'AbsolutGifts v1.5.0' (NullReferenceException: Object reference not set to an instance of an object) at Oxide.Plugins.AbsolutGifts+UI.LoadImage (Oxide.Game.Rust.Cui.CuiElementContainer& container, System.String panel, System.String img, System.String aMin, System.String aMax) [0x00000] in <92ce319f76544d409965d63cb4d40d09>:0 at Oxide.Plugins.AbsolutGifts.CreateGifts (BasePlayer player, System.Int32 step) [0x00982] in <92ce319f76544d409965d63cb4d40d09>:0 at Oxide.Plugins.AbsolutGifts.cmdUI_AG_VIP (ConsoleSystem+Arg arg) [0x00081] in <92ce319f76544d409965d63cb4d40d09>:0 at Oxide.Plugins.AbsolutGifts.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00fff] in <92ce319f76544d409965d63cb4d40d09>:0 at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9affce1cd15c4ec183941adef8db1722>:0 at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <4452f821def6406d834e4149849fe7ea>:0 at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0 ​
In response to Sharpie ():
Reinstalled with updated Image Libaribly and the new 1.5 gifts, but still getting:
Failed to c...
Ya no clue. 
Failed to call hook 'cmdUI_AG_VIP' on plugin 'AbsolutGifts v1.5.0' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.AbsolutGifts+UI.LoadImage (Oxide.Game.Rust.Cui.CuiElementContainer& container, System.String panel, System.String img, System.String aMin, System.String aMax) [0x00000] in <753d95f3b3be4cf6a645da8f02bd2c23>:0
  at Oxide.Plugins.AbsolutGifts.CreateGifts (BasePlayer player, System.Int32 step) [0x00982] in <753d95f3b3be4cf6a645da8f02bd2c23>:0
  at Oxide.Plugins.AbsolutGifts.cmdUI_AG_VIP (ConsoleSystem+Arg arg) [0x00081] in <753d95f3b3be4cf6a645da8f02bd2c23>:0
  at Oxide.Plugins.AbsolutGifts.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00fff] in <753d95f3b3be4cf6a645da8f02bd2c23>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9affce1cd15c4ec183941adef8db1722>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <4452f821def6406d834e4149849fe7ea>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0

For me, the issues started with this most recent wipe and the issue could still be fixed when UMod/Oxide release a final update but, I see the last post is the same issue Im having now. I type /gift and the menu opens up. I can view all the pages of gifts I have available to me. I select Toggle Admin and the next screen never appears. My mouse is present but now I cant open the chat menu or return to a state where I can use my mouse to look around. I have attached a photo of the message I see in console. Please let me know if I can provide you with any additional info. 

Thank you.

https://gyazo.com/16f4c5872a3e1f86b7cd21a3514026a9

Failed to call hook 'cmdUI_AG_VIP' on plugin 'AbsolutGifts v1.5.1' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.AbsolutGifts+UI.LoadImage (Oxide.Game.Rust.Cui.CuiElementContainer& container, System.String panel, System.String img, System.String aMin, System.String aMax) [0x00000] in <22e3442f19894ef5a001a30eabaf16f6>:0
116kb/s out
  at Oxide.Plugins.AbsolutGifts.CreateGifts (BasePlayer player, System.Int32 step) [0x00724] in <22e3442f19894ef5a001a30eabaf16f6>:0
  at Oxide.Plugins.AbsolutGifts.cmdUI_AG_VIP (ConsoleSystem+Arg arg) [0x00081] in <22e3442f19894ef5a001a30eabaf16f6>:0
  at Oxide.Plugins.AbsolutGifts.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x01022] in <22e3442f19894ef5a001a30eabaf16f6>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9affce1cd15c4ec183941adef8db1722>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <4452f821def6406d834e4149849fe7ea>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0
I've seen several people point this out with no help whatsoever, when you create a gift, after you select if it's only for vip, the gui shuts down. After that you only see the mouse and you have to relog to fix the problem. No gifts can be created through the gui.

I didn't have this problem first time I installed the plugin, after a while it stopped working and now it doesnt matter if I reinstall it, still same problem.
Same issue here, plugin is "Absolut(ely)" broken.
What errors (if any) are you seeing in logs?
Failed to call hook 'cmdUI_AG_VIP' on plugin 'AbsolutGifts v1.5.1' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.AbsolutGifts+UI.LoadImage (Oxide.Game.Rust.Cui.CuiElementContainer& container, System.String panel, System.String img, System.String aMin, System.String aMax) [0x00000] in <6ac3456738a94a9e9ae95a26cf57f998>:0
at Oxide.Plugins.AbsolutGifts.CreateGifts (BasePlayer player, System.Int32 step) [0x00647] in <6ac3456738a94a9e9ae95a26cf57f998>:0
at Oxide.Plugins.AbsolutGifts.cmdUI_AG_VIP (ConsoleSystem+Arg arg) [0x00081] in <6ac3456738a94a9e9ae95a26cf57f998>:0
at Oxide.Plugins.AbsolutGifts.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x01022] in <6ac3456738a94a9e9ae95a26cf57f998>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9affce1cd15c4ec183941adef8db1722>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <4452f821def6406d834e4149849fe7ea>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0
its not working