Wrong answer in the Crypto 102 task

[eun-infare]

I was stuck on this task and by checking the answer seems like there is an error there:

SIDUGRFBXGARYW is the ciphertext and WCHXOR is a key (from hint). Decrypting it using Playfair algorithm the resulting text should be PLAYFAIRCKRETX and not PLAYFAIRCKRET:

WCHXO
RABDE
FGIKL
MNPQS
TUVYZ

SI DU GR FB XG AR YW
PL AY FA IR CK RE TX

P.S. Really liked your workshop in BuildStuff, cheers!