Groovy : Unable to resolve class

hi i’m new with katalon and i’m not good in english sorry

yesterday i tried to make script mode and it works fine when i compile it
but today, i got some trouble. starting with when i use CTRL + Space when i type webui
it looks like the images

and when i type manually like WebUi.SetText()

it gave me an error groovy

is anyone in here can help ?

John Doe string should be in quotes, like this: ‘John Doe’

thanks, but i wanna ask something

why when i try webui using CTRL + space for fixing webui to WebUI
it doesn’t fixing automatically ?

Java is case-sensitive. You must start typing exactly the same class name - WebUI, not webui.