Moin, respectively bonjour,
i think i have had the same problem.
There must be a folder (in the game "data"-folder, not the mod) called units, in this there are normally one file called "destroyedship.dds" and the other is "shipdestroyed.dds"
When you open the files with paint.NET or similar, one is empty and the other is the destroyed mark. (you have to enlarge, because is not easy to see, also because itīs white not red, but it is the right one

)
Now you put the right one, copy it and give the filename from the empty one, the empty one you rename to ...old.
Thatīs it.