In one of the recent updates Nadeo broke PBs automatically loading when you start playing a map; this plugin aims to fix this issue. When you install this plugin it indexes the Autosaves/ folder in C:/[...]/Trackmania(2020)/Replays/ (this indexing can also be re-performed manually in the settings), so to make this plugin work you cannot make any changes to the Autosaves/ folder, if, for some reason, a personal best ghost is stored outside of this folder, it will not load (e.g if you've moved your replays to an archive or something similar).

As this plugin aims to 'fix' (more mimmic) the old pb ghost loading it does not load ghosts in the KO rounds (as this was not something that was done previously, but it does load in the time attack part of COTD, thanks to @TNTree for the info)