NullReferenceException at InitError

The following exception is thrown on startup, and the plugin will not load:

Failed to initialize plugin 'SAMSiteAuth v2.3.3' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.SAMSiteAuth.Init () [0x00079] in <568ca914117249688032b6da57ac514b>:0
at Oxide.Plugins.SAMSiteAuth.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00035] in <568ca914117249688032b6da57ac514b>: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.CSPlugin.HandleAddedToManager (Oxide.Core.Plugins.PluginManager manager) [0x00043] in <ec05e0208c9149bba43236ca58fea105>:0

I'm not able to reproduce this error