Missing file?

Does anybody know what this is?
18:13:27.750 [system.io] [info] exists: missing mods/teutonic/preferences/player.txt

It is from my system log after I tried to change the descr_strat file.

It has happened to me before but I just reinstalled the mod. Now I will have to learn what it is and what has caused it. From what I can see there is a file missing. If someone could attach it here it would be very halpfull.

Thanks

You sometimes see that if you have an error in the unit_models folder.