This is my workaround:
1/ you have to set the site directory to the correct one.
Websites > Edit site > Site directory > Site directory Option > Put /www/wwwroot/domain folder, instead /www/server.
2/ To save the site directory, you need to edit the "site.js" at /www/server/panel/BTPanel/static/js/site.js.
Find "path_new", change it to "path".
Then it will work.