Cannot Install OH2 after update to Synology DSM 6.1

Hello, I am new with OH.
After updating to DSM 6.1, I can no longer manually install openHAB2. I get the following message: “Port undefined configured for this package is either used by another service or reserved for system use. Please disable or modify the conflicting service, or contact the developer to modify the package configuration”.
Do you know what port is used by default? I have disabled my services and still get the same message when I attempt the installation. Does anyone experience the same problem, or has a fix? Thank you very much

I uninstalled the Webstation App and restarted twice the NAS (DS713+). The installation can go through now!
Thank you !