CSSCurrent en:CORS (Cross-Origin Resource Sharing)
General
CORS, Cross Origin Resource Sharing describes the process of receiving web resources, i.e. JavaScript files, CSS files, etc. from hosts other than the host where the original/main resources are hosted. This poses a security threat and is countered by the same-origin-policy (SOP) which avoids such requests.
Why is this important?
During work with the add-in, it can happen that the add-in tries to contact a Cryptshare Server (Server B) different to the one it is hosted on (Server A) as the user may have received a transfer from this server. As this is a CORS request, the user now would see an error screen:
In order to avoid this screen for future transfers and other users, the administrator of server B must add the requesting domain to the CORS configuration of their server.