Not working Chat in Teams

Hi hongju ,

Please check if you have met the limitations:

• The Chat in Teams button might not work if your browser uses strict privacy settings. 
• Chat in Teams doesn't include a link preview.
• Link previews and Chat in Teams don't give users permissions to view the item. Permissions must be managed separately.
• The Chat in Teams button isn't available in visual context menus when a report author sets More options to Off for the visual.
• For other issues, see the Known issues and limitations section of the "Collaborate in Microsoft Teams" article.

Best Regards,
Community Support Team _ Caitlyn