def xor(x, y):
    return bytes(a^b for a,b in zip(x, y))

cipher = bytes.fromhex("0e0b213f26041e480b26217f27342e175d0e070a3c5b103e2526217f27342e175d0e077e263451150104")

print(xor(cipher, b"myXORkeymyXORkeymyXORkeymyXORkeymyXORkeymyXORkey"))

    

i was also stuck at this but i solve by repeat the key :)