Let me help you with this.
I can confirm that this motherboard supports ECC memory and Non ECC based on the Technical Product Specification of the motherboard on page 11.
You can check it here:
Based on the memory specifications it seems it is an ECC memory but the motherboard supports ECC and non ECC so either ways the memory should be working. I would recommend you testing the motherboard with a different memory (brand and model) if possible to discard any compatibility issue with the system.
Another good step is to confirm with the manufacture of the memory if there may be a problem with the sticks so running a diagnose test would be good.