PoE2: Undefined String error (in german language)

I just played the first level and got some messages popping up saying something like "String format error... some more text". Instead of the real text that should be shown, something like "Drücke Leertaste um dem Angriff auszuweichen".

I am myself developer so i am pretty sure there was some replacement like: "i18n_DE($3rdTextToDisplay)" and that key was not found in german or so.

@Mod: please delete, re-created in PoE2 Forum