Comment Error – All Comments being blocked as potential bots

I searched the web and forums, but couldn’t find anything so I am placing it here. Two days ago I started getting an error message when anyone tries to comment on my site. They enter their comment, email, name then hit submit. The next thing it says is, ‘Blocked as suspected bot.’
It lets me comment from my site (I’m already signed in), but has blocked everyone else. I even tried using a different email of mine and got the error.
My site is https://www.meghanthetravelingteacher.com
Has anyone else experienced this problem or know how to fix it? Thanks.

The blog I need help with is https://www.meghanthetravelingteacher.com.