Hi, welcome back!
Since you’ve been away from the community for a while, it’s understandable to have lapsed on what we consider acceptable asset usage. You can check out this thread which has a great summary of how to credit graphical assets in your work. If you missed it, I’ll draw your attention to this note in the second post:
I’ve unlisted the thread while you get that sorted; you can let me know once that’s done and I’ll restore the thread. Note that you should credit the creators of individual assets by name; a blanket “credit goes to the creators” is not enough. This is not a warning or punishment, just a notification.