Could you please let me know when do you get this error ?
Also which version of Lightroom do you have on your computer ?
Which operating system are you working on , Windows or MAC ?
I got this error when updating lightroom cc yesterday via the creative cloud app.
This happened on Windows 7 . I uninstalled lightroom cc, and photoshop cc and then creative cloud app.
Then ran cc-clean exe
Reinstalled cre-clo-app, and then installed photoshop, that went fine.
But the cre-clo-app states to update lightroom cc. Which is strange as it is uninstalled.
Even after upgrading last night to Windows 10 and do all of the above I still get the same error.
Note that it also corrupts an 5.7.1 installation, it somehow removes the preferences and it crashes when trying to print .
Please provide a fix, as I am using lightroom in printing production daily.
Jan R. Smit
Fine Art Printign Specialist