Raspi3B - Free Version - Not possible to download any apk or other file

ucu

I'm new to emteria, not to IT :-) but at the moment I feel like a noob.
Managed to install emteria on a Raspi
Network via LAN works ..
Via WLAN too
Installed from internet the opengapp app..works
Try to install a opengapps package with it - fail, download stops if connected via LAN or WLAN
Try to install an apk with Fdroid - download stops if connected via LAN, works via WLAN

Why use opengapp? Playstore is the answer and then install Hangouts.

I'm sure it's a layer 8 problem. But where can I start to solve it?
Any ideas?

Regards

IKS

Works fine on any on my networks. How sure are you that the problem is in the OS?

ucu

All other Raspi with raspian, Linux boxes, Win boxes etc. work fine
I have a Fritz 5790 DSL 100/40
And it seems it only comes up with opengapps package zip.
I will try now to download it with another system to an usb stick and install from there.

BTW: is there another way to install the Hangouts app w.o. Playstore? Via Browser it seemed so lame.

Regards