Pop-Up Commercial Ads

My class has been using code.org since the beginning of the school year. Recently, students have been experiencing pop-up commercial ads during their code.org sessions. Has anyone else been experiencing this? Just wondering why we are now experiencing this.

That does not sound good. I have not been facing this issue. May be a virus or malware!

I have not experienced this, I would agree with Sangeeta on the virus/malware.