UR22 MKII Midi send issues to Yamaha AN1X

I recently acquired an UR22 MKII and I wanted to use it for sending new voices to my Yamaha AN1X via an1xedit.
Receiving bulks and commands from the an1x to my pc works fine, but if I send something towards my an1x it shows “sysexsize error” on the display. I already tried swapping cables. On both devices they are connected in-out and out-in.

My setup:
Windows 10 x64
An1xedit 1.1
UR22 Mkii
Yamaha AN1X
Yamaha / Steinberg USB Driver (had a Yamaha MX49 before)