Error when importing Anima2d

Hi!

I found an error trying to import Anima2d. I am using version 5.5.2f1 of Unity and when I download and import the plugin I get the following error in the console:

Assets/Anima2D/Scripts/EditorUpdaterProxy.cs(52,18): error CS1061: Type 'Action' does not contain a definition for 'Invoke' and no extension method 'Invoke' of type 'Action' could be found. Are you missing an assembly reference?

Am I doing something wrong? Do you have any idea about this?

Thanks in advance!

I had this issue becuase i had declared my own action class (also got an error for declaring a “point” class too). After these were renamed, things started working.