/mk off Macro does not work

[TsujiShion]

Time: 9:30
Frequency: always
World name: Lamia
Character name: Tsuji Shion
NPC name: not applicable
Monster name: not applicable
Class/Level: all
Party or solo: both
In-game time: 9:20am
Area and coordinates: X23 Y15
Steps:
1.Hi the macro use to work but now is not. I was hoping for a fix (macro italicized below). t used to remove the marked targets but now it says "off is not a valid waymark"when targeting a target that has been marked.

/mk off <t>