yeah i got the same error.. the error happened at this line:
res = sc.ipcMsg(51).datau64(1, utils.parseAddr(tid), [userID[0], userID[1]], [userID[2], userID[3]], [0,0], 1, 0, 0, 0).sendTo('fsp-srv').assertOk();
but there is no documentation for the datau64 function so i can't fix it for now...