Tell us what you are trying to do?
I'm trying to add a new post to the site and it's forcing me to create a template - even after I updated to 2.6.7 for layouts. I don't have a layout applied to any of the WordPress blog posts on the site (Articles). I just need to add a new article and it won't save properly. Under templates, I'm trying to save as "Don't use a template" and it doesn't like it. I get to a pop up screen that won't close about WordPress posts types.
Is there any documentation that you are following?
You've updated to Layouts 2.6.7 already, which should resolve the issue.
If you are still having problems, can you be sure to clear your browser cache? (You might want to try with a different browser than normal to confirm that cached JS files are the problem, clearing the cache can sometimes be a bit tricky.)
Also, if you are using any JS optimisation plugins try temporarily disabling those and re-testing.