As of yesterday when my Brave browser was upgraded to 1.86.139, it broke the integration with IDM. Reporting this as an issue. Edge and Chrome still work fine so it definitely something to do with the new version of Brave. IDM version did not change. Appreciate it if someone would look into this.
Most of the people who had been having issues said it resolved. But some still are having problems. It would probably be better for you to contact IDM developers directly.