I have had many transactions for services provided by psy. All completed perfectly.
If you need client or server side developer contact him. He is pro and trusted with excellent customer support.
Try to re-install the client, to be fully clean.
Maybe there are corrupted files, that’s why it showing you black.
Otherwise just find a same file your editing from clean client or files, and take a look of them, how similar they are or different.
That’s what i would do.
3rd Thing i would try to Youtube, black UE items etc, or something like this.
Hope it will help you.