Don't worry. It's just a translation issue. Since you can switch languages the zip files tells TWRP to print out messages like "md5 created".TTWRP then prints the desired message in your selected language.
However, as you can see it can not load the strong with the identifier "no_md5" so it uses the default value, which is absolutely fine
I use Iceman's TWRP. Work's great without these errors