i have no clue what this means

Assets/Standard Assets/Scripts/General Scripts/ActivateTrigger.cs(43,58): error CS1061: Type UnityEngine.GameObject' does not contain a definition for getactive’ and no extension method getactive' of type UnityEngine.GameObject’ could be found (are you missing a using directive or an assembly reference?)[15356-screenshot+(11).png|15356]

it says the errors on line 43??

activeself is the problem

Use activeSelf

Case sensitive

Read the reference link, it says that it is read only. This means you use that to check if it is true or false. The reference also says that you use

GameObject.SetActive

to actually change the state