I made a CSS stylesheet and URL here https://styler.botpress.app and uploaded to my bot. However, it doesn't update my bot on live website, what can be the problems?

Hello @User Have you added the url for the css sheet from the app on the settings page for the webchat integation and clicked save configuration?

Yes I did. After I tonight it works today, I guess it just takes a few hours to update the cloud or something

I am glad it is working for you now.