To prevent malicious posts and advertising, non-registered users are restricted from posting via cellular networks on Duo.
If you're using Duo on a mobile device, please make sure you are signed into your OP.GG account to post.
Q. I’m experiencing the same issues on non-mobile devices.
In some cases, PC cafes or certain IP addresses may be classified within the mobile network IP range.
In such cases, non-registered users may be restricted from posting for the same reason. Please make sure you are signed into your OP.GG account.