For future search and better legibility, please don’t post images for what is basically text. And when the text is properly formatted in a monospace font, the ----^ will point to a specific location.
Also, it seems the black part of the screenshot is not related to your programming at all? And obviously, seeing some code will help people help you. The source of the error might very well be in the previous line as well.
Did you search the forum for the error? It’s mentioned earlier in Part 1, and also on GitHub: