Streaming from FRITZ!Box NAS via SMB

Other Gear & Services
1

Hey! So I am running Infuse Pro on all my iOS devices and Apple TV.

Now I want to move to a local setup and have a FRITZ!Box router where I can activate NAS via SMB and plug a USB drive in the back.

If I activate the NAS functionality, I can access it via Finder in macOS. But when I use the same credentials, I am getting an error in Infuse Pro.

Anyone can provide a guide for FRITZ!Box?

2

UPDATE: Weird. The same settings work on my iPad but not on my iPhone.

Same iOS version (14.3), same privacy settings and I sync settings between iPad and iPhone.