@help I'm seeing this error in my logs, and it pops up in my account now and then. I tried to rebuild my account, but then my site disappeared altogether. It couldn't build my site. I disabled the Newsletter feature and then rebuilt my blog, and my site came back. I enabled Newsletters again, and I'm getting this error once more.

Error: error building site: assemble: "content/newsletters/2998.md:1:1": period in shortcode name only allowed for inline identifiers