Okay, it took some troubleshooting and i still don’t know what solved the problem but i was able to connect homey.
through the advanced settings on the admin panel i did the following http://orbilogin.com/adv_index.htm (standard username: admin standard password: password)
i’ve placed the orbi in AP mode (accesspoint)
i’ve turned off co-existentie 20/40 mhz
at the 5gh settings i turned of all the selectionboxes and turned the signal strength down to 25%
now i was able to connect homey. Lets hope it still works when i turn everything back on.
UPDATE: Still able to connect, it seems the problem is solved. Has anyone any clou what the trick was for people with the same problem?