Invalid chess color, should be white or black

lichess suffered a regression, normally its updates were for the better, however its progress has slowed down a lot, for the studio creators from which we extract puzzles from lichess games, when you put the board editor and create an exercise, a 404 error appears with the message Invalid chess color, should be white or black. I hope this will be corrected soon as it will affect many players

Click on your user name, click Board, click Reset colors to default. @Real10001
If that does not do the trick. Layout the steps in another post ... so someone else can reproduce the error.