Service Catalog link attachments are not being created in Service Desk, no error is displayed in the web during the process.
Release : 17.2 and higher
Component : SERVICE DESK MANAGER
The issue was caused in Service Catalog, the integration URL of Service Desk, was pointing to a Load Balancer but it was not maintaining the session in the initial server as it was configured only one server to handle the WS calls, so after loggin it went to otherserver to proceed with the WS method URLlinkattachment, since the SID was not created in this server the call return is set as invalid.