Hi Tom,
I’m encountering an issue when using the Customizer in GP Premium. When saving changes to Blog Post Title color I receive the
error message ‘changeset_post_save_failure’. I’ve manually adjusted the WP memory to 512m to no effect as some people have suggested this alleviates the problem, and my hosting Tech Support at Siteground have had a thorough look at the site and have found no issue from their end so I’m just checking to see if you’ve encountered this at any point.