Hello colleagues.
I'm having trouble with creating and using a Proxy Bridge .
I use this instruction: https://help.sap.com/viewer/b0cc1109d03c4dc299c215871eed8c42/Cloud/en-US/ed1c6732d4214c68846ab9813b9df943.html
After deploying app in SCP I try open this link, but have error.

What could be the problem and what I am doing wrong?
Thanks in advance for the answers)
Project tree:

Servlet code:
package proxy;
import com.sap.ecm.api.AbstractCmisProxyServlet;
public class CMISProxyServlet extends AbstractCmisProxyServlet {
private static final long serialVersionUID = 1L;
@Override
protected boolean supportAtomPubBinding() {
return false;
}
@Override
protected boolean supportBrowserBinding() {
return true;
}
public CMISProxyServlet() {
super();
}
@Override
protected String getRepositoryUniqueName() {
return "DocRep";
}
@Override
// For applications in production, use a secure location to store the secret key.
protected String getRepositoryKey() {
return "1234567890abc";
}
}
web.xml code:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>cmisproxy</display-name>
<servlet>
<servlet-name>cmisproxy</servlet-name>
<servlet-class>proxy.CMISProxyServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>cmisproxy</servlet-name>
<url-pattern>/cmis/*</url-pattern>
</servlet-mapping>
<security-constraint>
<web-resource-collection>
<web-resource-name>Proxy</web-resource-name>
<url-pattern>/cmis/*</url-pattern>
</web-resource-collection>
<auth-constraint>
<role-name>EcmDeveloper</role-name>
</auth-constraint>
</security-constraint>
</web-app>