Help me with inserting pictures. It's causing me a hassle

I have recently follow this video for making my website '
I followed all the steps for the thing and the only part that doesn’t work is with the Image part at 18.03. I am stuck there for quite a while as either the code doesnt work or the function is not there anymore.
Thanks for getting back to me



Please make sure you have followed the instructions from 15:00, there it shows you how to add the gallery, by adding Projects and using the shortcode in a Text Widget, you can also read more and watch setup videos about those settings in Our Documentation:

Best Regards,