Runtask.exe.Unable to lookup SID for name user-name

[yanezes]

Hello to all, me a constant mistake goes out in the visor of events,

"""Unable to lookup SID for name user-name,No assignment has been effected(been carried out) between(among) the names of account(bill) and the identifying ones of safety.at Unable to execute event(runtask::start line 210)
Execute file name: C:\Archivos de programa\SWsoft\Plesk\admin\bin\runtask.exe"""

You can help me, regards