Found the bug, this will be fixed in the next update!Strange, it works for me without problems, but I noticed that it seems like the save didn't get upgraded to the latest version or something. When I loaded the save you gave me there was a new achievement with a 20/50 fitness progress, but when I opened my save it was still 20/20, so that's probably the problem.
@Faerin Don't know if it's important of if I'm the only with this problem, but I'll tag you just in case again![]()
For now, this can be fixed by editing the max value manually!