Macbook Air M3 with Satechi slim pro hub doesn't recognize second monitor

[Mark046]

Hi,

I'm having trouble with getting the second external monitor going. My setup is a MacBook Air M3 with Satechi hub.

Details:

Satechi
https://www.notebooksbilliger.de/sat...t+black+854994

Two external Acer monitors:
https://www.amazon.com/Acer-VG240Y-b...07CYJ47JB?th=1
The only difference that my version has two HDMI ports and 1 VGA, no displayports

One is connected with a HDMI cable in the only HDMI port available on the Satechi.
One is connected with a HDMI cable with HDMI to usb C adapter in de USB C port next to the HDMI port.

Seperately from eachother they both work fine as an external monitor but when I plugin the second only the first gets signal. So it's not about the adapter or cable I guess.

In the system settings I only see one external monitor.

The external keyboard and mouse work fine.

I installed DiplayLink but no solution.

Any ideas?

Thank you all!