Your issue is more likely to be viewport/DPI scaling rather than the static mesh’s location.
There is another version of ProjectWorldLocationToScreen called UWidgetLayoutLibrary::ProjectWorldLocationToWidgetPosition, try that. It accounts for things like viewport/DPI scale//etc which are most likely the cause of your issue.
Thanks a lot. I think so. How can I know the viewport and DPI? I was searching but I haven’t found anything about. Anyway, this is my first game. I’m sure I will come back to modified when I have learned more.