You have not given us any details to help you with.
Just out of curiosity, what happens if you turn off the GPU usage in the "performance" tab of the Preferences dialog?
I too used LRcc for a couple of days, rebooted my computer this afternoon and got the same error message you. I tried sign out sign in uninstall install all with the same result.
Did not tinker with any of the setting options in the preference dialog. Just installed and worked successfully for a couple of days using the default settings.
Since the first crash some hours ago, LR has not stayed open making it impossible to try different settings.
The default install provided a fully working app - I tried out the new feature and soon after went back to my project.
Could the fact that I uninstalled the previous - 5.7.? version have anything to do with this?
How can I re-install the previous version at it was stable?
Do any of you have any answers?
And / or do you know how to engage Adobe?
Thanks - Kalli
All OK now. Updated the driver for the GPU.
Still don't know why it worked without the update for a couple of days and than not . . .
Happy that it appears to be "fixed" now.