Apologies for mangling it, it was much too long
My summary:
"Niemann had recently shared a post on social media informing his followers that he would soon be coming to Paris.
Norwegian outlet TV 2 has reported that Neimann pulled out at the last minute as soon as he learnt about the new security measures. The event’s management confirmed to TV 2 that Niemann pulled out shortly before his scheduled arrival at the tournament hotel. His exit comes in the wake of an announcement by the organisers and billionaire Jan Henric Buettner, who revealed the installation of advanced security equipment aimed at detecting cheating.
[Magnus] Carlsen had previously accused [Neimann] of cheating. Niemann later admitted to cheating in online games but denied all allegations that Carlsen made and went on to file a $100 million defamation lawsuit."