Just got the same issue you have
Are your browsers, Creative Cloud app, and operating system set to Chinese Simplified or something else?
Please change the Operating System language and Creative Cloud application language setting to simplified Chinese and test.
Thnaks for the reply
I did change both OS and CC application language to simplified Chinese, still got the same error.
BTW, I can open photoshop and premiere pro.
Please contact Adobe support via chat or telephone. They should be able to help.
Adobe After Effects supports Simplified Chinese.
Change the language settings of your computer to Simplified Chinese, and then launch the application.
For more information please check this: Known issues in After Effects CC 2017