why my expand - toolkit 2D is not working

the Tookit 2D was setup a week ago , but today ,the menu only give " setup for javaScript“ , and i can see the Toolkit menu in the “create”。
i had redownload and reimport , it doessnt fix the problem。
what can i do?

This is likely because there is a script error in your project and Unity has stopped loading scripts. Look In the log to identify any script errors and correct them. Once all errors have been resolved, Unity will start loading all scripts - at which point 2d toolkit should start working again.

but i have deleted the script,it doesn’t work.