Export Error

Hello! I love the idea of this plugin. I'm working on a link to where I can export the Canvas image and update a photo frame on a set interval but I'm running into a problem with the Export API call. When I call Export from my plugin, I'm receiving this error in console:
 

(08:10:52) | Failed to call hook 'ExportCanvas' on plugin 'Canvas v1.0.2' (NullReferenceException: Object reference not set to an instance of an object)

at Oxide.Plugins.Canvas.ExportCanvas (Oxide.Plugins.Canvas+Painting painting, System.Single scale, System.Int32 width, System.Int32 height, System.Boolean transparent, System.Int32 blur) [0x00000] in <d6898ea79d324e5ea265cf1dcfad70a4>:0

at Oxide.Plugins.Canvas.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00403] in <d6898ea79d324e5ea265cf1dcfad70a4>:0

at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <e23ba2c0f246426296d81c842cbda3af>:0

at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <50629aa0e75d4126b345d8d9d64da28d>:0

at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <50629aa0e75d4126b345d8d9d64da28d>:0

I am calling that API method from my plugin using this syntax:
 

byte[] imageData = (byte[])Canvas?.Call("ExportCanvas");

Maybe I'm just doing it wrong? An assistance would be much appreciated!

32 minutes ago, Raul-Sorin Sorban said:

I forgot to update the API docs on the last update. Pushing now another update and updating description. Sorry about this, kind of didn't expect anybody to use the API just yet haha

No worries, dude! I'm excited to add this cool idea to our community.