Customizing Sitecore routing and security settings
In standard Sitecore installations, there is no need to change routing or security settings. However, if custom routing or security has been set up, it is important to allow access to these paths and the subfolders on them:
/XtmFiles/
/xtmapi/
xtmswagger/index
If it is necessary to customize the routing and security settings for your Sitecore installation, contact your company's Support team.