Qr.codes is a legitimate URL shortening service similar to bit.ly and linktree, it's often used to create QR codes. They do have pretty bad feedback on Facebook(facebook.com)
Virustotal(virustotal.com) indicates only 1 out of 97 vendors flagged it as malicious, so it's most likely a false positive.
you don't actually need to visit the site to enter the comp, can simply download the app from the respective app store without clicking on any links on this competition.
OK, so my VPN antivirus software picked up a “potential threat” via this website!
Dunno what u guys think but felt it was my duty to point this out. Enter at own risk, I guess!
Messaging OP now and will also hit the report button!