I've just signed up for HDHomeRunDVR

My hope is to get the following setup up running with DVR:
Tuner: HDHomeRun EXPAND, Model: HDHR3-4DC
NAS: Synology DS413
Result so far: HDHomeRun RECORD not running | 0x1000040c
What have I been doing so far?
1: Link your HDHomeRun tuner here http://my.hdhomerun.com/account/register.html.... Confirmed with succes
2: I've followed these step: http://my.hdhomerun.com/?dvr=1
2a: When I Execute the HdHomeRun Setup app, from hdhomerun_windows_20201030.exe, I get the following result:
Model: DS413
SSH Enabled: Ok
SSH Session: Ok
NAS Architecture: ppc
HDHomeRun Share: Ok
Installing Service: Ok
Configuring Service: Ok
Starting Service: Ok
SUCCESS
All seems fine, but when I go to this page http://my.hdhomerun.com/#tab-2 it says,
Your HDHomeRun products:
HDHomeRun EXPAND 141033BC (Green check mark)
Version 20200907 (Green check mark)
194 Channels (Green check mark)
No HDHomeRun DVR detected.

When I go to Synology package center, I see no HdHomeRun DVR Manager
What I've been trying so for
- Rebootet a lot, both computer, NAS, Tuner and Router
- Manual installed the .spk-file on the Synology Nas (I've tried both version 1.0.2 and 0.8.2)
- Checked write-access for the admin in the shared folders on Synology
- uninstalled and installed again
- setup port forwarding in the Router. Port 59090 and 65001 (TCP and UDP) forwarded to my NAS IP Address
Any suggestions? I really need a lifeline


Thx in advance - happy new year
