Every time I click on the preference button in the edit tab, it comes up with unexpected error has occurred... blah blah blah. And I have tried the sign out of adobe and sign back in. It didn't fix it.
Please make sure your graphics card is up to date.
If so Follow solution to thread Lightroom CC freezes when on Develop mode and disable use of Graphics processor in Lightroom.
Let us know if that helps
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