You can manually set the fps higher in crpg_beta_config.ini via iMaxFrameRate=
I have mine set to 125 to reduce screen tearing slightly. (I remember reading that if your FPS is set above your refresh rate then you do not want it at exact multiples of your refresh rate; 120, 180, 240 etc. in most cases. I can't find the post though so take it with a grain of salt.)
Could be that it can't force triple buffering because it's already on.
Well, crap, then I have no idea why I get a lot of micro-stuttering when there's 30+ people on the screen. I mean the FPS doesn't drop from 60 when this happens so I thought it must be due to that error message. I give up, I can live without vsync.