check in your db/pre-re (or re) /skill_require_db.txt
change this
214,0,0,20,0,0,0,99,0,0,hiding,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 //RG_RAID#ƒTƒvƒ‰ƒCƒYƒAƒ^ƒbƒN#
to this
214,0,0,20,0,0,0,99,0,0,none,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 //RG_RAID#ƒTƒvƒ‰ƒCƒYƒAƒ^ƒbƒN#