Firstly, pls check whether the brake unit connected wrong, attached the document for your reference.
Then , Pls ask your engineer to run the inverter without any load, without brake unit too, whether everything be ok.
If the brake unit connect is correct, the problem should from motor or VFD itself, better to know the E03 & E06 problem, we are hardly to know the detail for other brand, I think customer buy this model should have the manual can tracking the error problem.
I'm waiting for your reply.