Synology DS214+ openHAB is not runnig?

Hello !
I would to ask you helping me to finde the problems of my installation.

I use the DS214+, created the folders on public and installed OpenHAB-1.7.1-syno-noarch-0.001.spk

The DS installed the package, running.

I copy the configurations folder of the runtime zip and put in test files Haus.item in items folder and Haus.sitemap in sitemaps folder. Copy org.openhab.io.myopenhab-1.7.1.jar to addons folder, copying the webapps folder.

change the cfg
security:option=OFF
myopenhab:localPort=8081
security:netmask=192.168.0.10

Restart of the App.
open the browser with: http://192.168.0.10:8081/openhab.app?sitemap=Haus#_Home

all I get is:
HTTP ERROR 500
Problem accessing /openhab.app. Reason:
Sitemap ‘Haus’ could not be foundCaused by:org.openhab.ui.webapp.render.RenderException: Sitemap ‘Haus’ could not be found

for Info: it did work a view days before… ???
thx for help!

The App is now running, seams to be a problem with the rights.

OK, but the DSM is not reachable over the Web, so either not the App.?
I tried now so many things but can not get a connection via web. The Quickconnect from Synology is working fine, also when I run the App on a Laptop I can get to it via web.
Do not know what the problem of the DS is now.

The same problem. You have found a solution?
thanks

I fixed it with the forwarded Ports on the Router and settings in the DS, also the internet provider setup was not correct.
thx