Problem installing NVMe M2 SSD using PCIe adapter

I want to replace my Samsung 980 Pro with the new 990 evo plus 2Tb.
There is a pin missmatch so ASRock told me to use a NVMe M2 to PCIe adapter.

The Problem:
When I install the SSD with the adapter the GPU spins to life but does not output any signal.

In the manual for my mobo it says that when using a Ryzen CPU the pcie2 port runs at x16 and pcie4 runs at x4.

The M2_1 slot is not in use; The GPU is connected to pcie2; The SSD to pcie4;
So it should work in theory.

Maybe I have to change some settings in the BIOS?
However, I don't know what settings.

System:

Mobo: AB350 Pro4
Version: 5.8

CPU: AMD Ryzen 5 3600
GPU: NVIDIA GeForce GTX 1660 Ti
RAM: DDR4 3200 32GB in dual channel mode
SSD: Samsung 990 EVO Plus 2TB
Adapter: SABRENT NVMe M.2 SSD to PCIe X16/X8/X4 CARD

Thank you for the help.