Lavatar, thanks for contacting us through communities. In regards to your question the compatibility list only shows the CT8G3S160BM and to be honest I think the RAM you purchased could have a different electrical specification for your region.
I was not able to find that specific model number on Crucial webpage in order to get additional information.
What I can recommend you is to test another memory on the NUC, hopefully one from the tested list.
i can confirm that the "CT8G3S160BMCEU" Ram is not working!
Hynix Ram from the List worked.
Very sad that a few letters change the whole game!
Thx for youre support!