Hi @Zoey Liang ,
Thanks for visiting our forum.
Please kindly note that this forum is only available in English.
I have made a test in my environment, and I cannot reproduce your issue.
This could be due to a number of factors, such as a temporary issue with the SharePoint service, a problem with your internet connection, or an issue with your browser.
Here are a few things you can try:
- Wait a few minutes and try again. Sometimes SharePoint Online experiences temporary service disruptions that can cause these types of errors.
- Clear your browser cache and cookies, then try again. This can help to resolve issues related to browser settings.
- Try using a different browser. Sometimes issues can be browser-specific, so switching to a different browser may help.
- Check your internet connection. If your internet connection is slow or unstable, it could be causing issues with saving your settings.
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