access denied ("java.util.PropertyPermission" "com.sap.security.xssencode" "read")

Hello everybody,

I try to start SUM GUI from Web .

Whe I execute the sdtdsu.jnlp file

the following error apperead:

#### Java Web Start Error:

#### access denied ("java.util.PropertyPermission" "com.sap.security.xssencode" "read")

java.security.AccessControlException: access denied ("java.util.PropertyPermission" "com.sap.security.xssencode" "read")

    at java.security.AccessControlContext.checkPermission(Unknown Source)

    at java.security.AccessController.checkPermission(Unknown Source)

    at java.lang.SecurityManager.checkPermission(Unknown Source)

    at com.sun.javaws.security.JavaWebStartSecurity.checkPermission(Unknown Source)

    at java.lang.SecurityManager.checkPropertyAccess(Unknown Source)

    at java.lang.System.getProperty(Unknown Source)

    at com.sap.security.core.server.csi.util.StringUtils.<clinit>(StringUtils.java:39)

    at com.sap.sdt.util.misc.BootStrapper.deleteErrorLog(BootStrapper.java:183)

    at com.sap.sdt.util.misc.BootStrapper.init(BootStrapper.java:110)

    at com.sap.sdt.util.misc.BootStrapper.<init>(BootStrapper.java:44)

    at SDTGui.<init>(SDTGui.java:46)

    at SDTGui.main(SDTGui.java:73)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

    at java.lang.reflect.Method.invoke(Unknown Source)

    at com.sun.javaws.Launcher.executeApplication(Unknown Source)

    at com.sun.javaws.Launcher.executeMainClass(Unknown Source)

    at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)

    at com.sun.javaws.Launcher.run(Unknown Source)

    at java.lang.Thread.run(Unknown Source)

I use JRE 1.8.0_66 .

Which java version should work ?

Or how I can fix the error ?

Best regrads

Bernhard Deubner