I have added the image. Either you can move it from the archive itself to the right folder, or you transfer your savegame to the new version. If you don't want to load it again you can move an empty picture named Erfolge_BG.png in
img/pictures/
https://jitsukoan.itch.io/dampftraum/devlog/417414/release-dampftraum-v15-hotfix...
Thx for playing!!