Gutenberg and ACF Pro
I updated to WordPress 5.0 and have an unauthorized copy of ACF Pro running on my install. I was getting the following error message when trying to add any block to a post:
TypeError: Object(...) is not a function
Manually edit the file /plugins/advanced-custom-fields-pro/assets/js/acf-input.min.js and replace all instances of wp.hooks with wp.acf_hooks.