Hi @mlan, I am afraid that that previous Unreal Engine for EyeX SDK has been deprecated since last year however we are currently working on a new replacement.
The software is still pre-release but if you are a keen developer and don’t mind working with an early version, we would be interested to share with you this code.
If this appeals to you, please kindly PM you personal email address and I will put you in touch with the right people. Thanks.
That being said, if the advice from @psyxi4 resolves your issue, that would also be great to know!