NullReferenceException at InitError

after todays update I get the following error show up:
anyone else getting this.

Failed to initialize plugin 'DiscordRewards v1.3.1' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Core.Plugins.Plugin.AddCovalenceCommand (System.String[] commands, System.String[] perms, Oxide.Core.Libraries.Covalence.CommandCallback callback) [0x0000a] in <1fe782f4b27a43ae85d29ebb2d56c007>:0
at Oxide.Core.Plugins.Plugin.AddCovalenceCommand (System.String[] commands, System.String callback, System.String[] perms) [0x00014] in <1fe782f4b27a43ae85d29ebb2d56c007>:0
at Oxide.Core.Plugins.Plugin.AddCovalenceCommand (System.String command, System.String callback, System.String perm) [0x00012] in <1fe782f4b27a43ae85d29ebb2d56c007>:0
at Oxide.Plugins.DiscordRewards.Init () [0x00031] in <ad42294b451547029c0c8cc23216203f>:0
at Oxide.Plugins.DiscordRewards.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0004e] in <ad42294b451547029c0c8cc23216203f>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <3e46d2a997e94a3cb08cf065508cd483>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <1fe782f4b27a43ae85d29ebb2d56c007>:0
at Oxide.Core.Plugins.CSPlugin.HandleAddedToManager (Oxide.Core.Plugins.PluginManager manager) [0x00043] in <1fe782f4b27a43ae85d29ebb2d56c007>:0
It works on my server.