This content is blocked. error in block editor on self hosted docker instance

That error is from Cloudflare, not WordPress.

I recommend checking with their support, maybe there’s a security rule you hit somehow.

I fixed it by adding

add_header Content-Security-Policy “default-src ‘self’ https: data: ‘unsafe-inline’ ‘unsafe-eval’; connect-src ‘self’ *.example.ca; frame-src ‘self’ https: blob:;” always;

to the nginx.conf file

• This reply was modified 4 minutes ago by daronsong.