Just an FYI it’s a memory allocation issue, just like a previous person had on this forum https://support.themosaurus.com/forums/topic/blocks-do-not-load-while-editing/#post-38187 which looks like you guys just blamed the hosting (lol)
PHP memory is at 1GB on my host, it’s Gutenberg and your Grimlock plugin that is the cause.
If you use the Elementor as the page builder and import the pages it’s fine.
You may want to investigate this as i’m sure others that purchase this theme will have similar issues