,the associated scrip cannot be loaded error on FPScontroller prefab from the standard assets

,I am a beginner on unity and i have an issue with the FPScontroller prefab "The associated script can not be loaded" on the bottom of the screen there is a message with a ! that says "Component at index 2 could not be loaded wen loading game object 'MainCamera'. Removing it!" as a warning and this error: i did delete the camera but it doesn't do anything.

Assets\Standard Assets\Utility\SimpleActivatorMenu.cs(11,16):error CS0619: 'GUIText has been removed. Use UI.Text instead'

please help me

i use unity 2019.4.11f1 Personal