I used the Yotako sample theme to test out how the plugin works, and when I published it, the theme looks fine on the website. However, when I try to edit the theme on Wordpress Gutenberg, I see this instead. There is no way for me to edit the theme on Wordpress directly.
Thank you for reporting the bug.
Please try to regenerate your design.
Let me know if you still have the problem.
Cheers,