Server cannot see itself

1. Version of Plex you are using
   1.1.3.2700-6f64a8d

2. Version of DSM you are using
   DSM 6.0.2-8451 Update 1

3. NAS Model number.
   DS916+

Hi all,

I installed the PMS through the package provided on the website.
Installation works without any problem and i'm also able to start the Server after the installation. I can visit the :32400/web url but it won't find the server...

Tried a lot of things:

• Made sure Jumbo Frames are off (MTU is 1500)
• Removed my LACP PortChannel to the Switch (Meraki)
• Installed a PMS on my MAC, this Server can by found by the NAS (on the :32400/web url), so i assume no network issues
• Reinstalled the PMS, remove the User + Share (Q7)
• Restarted the NAS

Logs will be sent to trumpy81