The DLL version on bakkesplugins.com is behind the one in this repo and the file structure is incorrect causing the plugin to fail on load when installed from the bakkesplugins.com website. The data directory needs a rankgrapher subfolder with the images placed inside. If the data\rankgrapher path doesn't exist the plugin fails to load.
For others reading this the manual fix is:
Exit Bakkesmod
Navigate to %APPDATA%\bakkesmod\bakkesmod\data
Create a folder titled rankgrapher
Move the two image files named closebutton.png and ranktrackerbg.png from the data folder into the new rankgrapher folder.
Start Bakkesmod and then Rocket League.
The plugin should now create two csv files and begin recording your rank data and rendering graphs in game.
For latest version with support for 2540x1440 resolution, download updated dll from github and replace the existing dll in bakkesmod/plugins.
there was a not on the bakkesmod page to get the latest dll from github.. why not just publish that on bakkesmod properly or on repos releases section?
When running the game at resolutions other than 1920x1080, the graph is not placed under the scoreboard.
The screenshot is taken at a resolution of 2560x1440. You can see the graph is placed on top of the scoreboard, which hides the stats.
This happens more or less the same in other resolutions (bother higher and lower than 1920x1080).