Isn't it caused by an illegal character in a folder name? Have you made any new folders? Installed anything new? Any folders with { or } in? If you remove that folder it may help (If there IS a new folder with odd characters of course)

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.