Object reference not set to an instance of an object

[jonathan920]

3:11:17 PM: Script [C:\Users\USER\Desktop\Farm\Plugins\BuildSomething\BuildSomething.dll] run error:
3:11:17 PM: Error: Object reference not set to an instance of an object.
3:11:17 PM: Stack trace: at DefaultNameSpace.DefaultClass.PluginRun() in c:\Users\USER\Desktop\Farm\Plugins\BuildSomething\1.cs:line 31

I suddenly got these error when i try to run my plugin. Any idea how to run my code smoothly? Tried creating using the new template cant work too.

 

[Biocide]

3:11:17 PM: Script [C:\Users\USER\Desktop\Farm\Plugins\BuildSomething\BuildSomething.dll] run error:
3:11:17 PM: Error: Object reference not set to an instance of an object.
3:11:17 PM: Stack trace: at DefaultNameSpace.DefaultClass.PluginRun() in c:\Users\USER\Desktop\Farm\Plugins\BuildSomething\1.cs:line 31

I suddenly got these error when i try to run my plugin. Any idea how to run my code smoothly? Tried creating using the new template cant work too.

If you include the code its easier to help you.
If you dont want to make it public you can send a pm.