This is my code:
<Badge color="primary" invisible={chat.notificationsCount === 0} badgeContent={chat.notificationsCount} className={classes.badge}>
<ListItemText primary={chat.title} className={classes.itemText} />
</Badge>
With chat.notificationsCount equals to 0.
The error I can see in console:
warning.js:33 Warning: Received `true` for a non-boolean attribute `invisible`.

What version of @material-ui/core are you using? invisible was only added in v3.5.1.
Recommend using 3.5.1 because 3.5.0 has a missing dependency. 13581
Most helpful comment
What version of
@material-ui/coreare you using?invisiblewas only added in v3.5.1.