# FAQ Why is there data missing from my reports? It's possible that the data is missing because the short time format for the server PC has not been changed to 24 hour. If this is so, call data is added to the database with incorrect or missing time information which in turn means these calls may not be selected when a report is being generated. See the help section Date and Time Format for details of how to change the short time format correctly. What is CORS? The CCS Web Server is a RESTful service that communicates with the same HTTP verbs (GET, POST, PUT, DELETE, etc.) used by web browsers to retrieve web pages and send data to remote servers. "Cross-domain" AJAX (XMLHttpRequest) requests are usually forbidden by default because of their ability to perform advanced request that introduce many security issues as described in cross-site scripting. Cross-origin resource sharing (CORS) is a mechanism that allows AJAX requests on a web page from another domain outside the domain from which the resource originated. Why is there a delay before my data is displayed? CCS Apps use AJAX (XMLHttpRequest) to request data from the server, which is an asynchronous service. What that means is that when the App requests some data from the Server it cannot then wait until that specific data is returned, it must continue processing. Data may be returned in a different order to the AJAX requests made for that data, which in turn could lead to the App working in an unexpected way. If you are having issues with unexpected operation and the network is running normally and not under load, it should be possible to use the Browser page reload option to restart (reload) the App to resolve any issues caused by the asynchronous data service.