The server is refusing to process the request because the entity has an unsupported format

"The server is refusing to process the request because the entity has an unsupported format" hatasının çözümü için  Content-Type = ...;type=entry            "type=entry" eklemeniz gerekmekte.

var urlRead = "/createSet";
var headers = {
"X-Requested-With": "XMLHttpRequest",
"Accept": "application/atom+xml,application/atomsvc+xml,application/xml",
"Atom": "http://www.w3.org/2005/Atom",
"Content-Type": "application/atom+xml;type=entry",
"DataServiceVersion": "2.0"

};

sapui5 specific version

Specific Version

Check the available versions with respective maintenance status at https://sapui5.hana.ondemand.com/versionoverview.html and https://openui5.hana.ondemand.com/versionoverview.html.

You can refer to a specific version by using a versioned URL as in the example below:

SAPUI5	OpenUI5
<script id="sap-ui-bootstrap" type="text/javascript" src="https://sapui5.hana.ondemand.com/1.32.7/resources/sap-ui-core.js" data-sap-ui-theme="sap_bluecrystal" data-sap-ui-libs="sap.m"></script>	<script id="sap-ui-bootstrap" type="text/javascript" src="https://openui5.hana.ondemand.com/1.32.7/resources/sap-ui-core.js" data-sap-ui-theme="sap_bluecrystal" data-sap-ui-libs="sap.m"></script>

https://sapui5.hana.ondemand.com/docs/guide/2d3eb2f322ea4a82983c1c62a33ec4ae.html