FromSoftware and Bandai Namco confirmed that there is currently an Elden Ring PC error that will prompt the “inappropriate activity detected” message to come up even if a person isn’t cheating.
Elden Ring and its Shadow of the Erdtree DLC are available on the PS4, PS5, Xbox One, Xbox Series X, and PC.
The last patch for Elden Ring didn’t include a fix for this issue.
When the “inappropriate activity detected” message comes up, it means the anti-cheat systems for Elden Ring potentially detected cheating and, as a result, will keep people from playing online.