Why getting this message "Attention You are not allowed to check this content"?

I am unable to access any of the contest and practice problems on CodeChef, getting this message “Attention
You are not allowed to check this content
” when access from the laptop but its absolutely working fine with the mobile with the same user account. So is there something wrong with the website or something else?

I get a similar error when I want to leave comments on some posts. but I think this is because I am a new member, and if you have been on the forum for a long time, then write to admins

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