The newest update has caused two frustrating programs. Files turned to TIFF format now appear as black when created by OnOne or MacPhun plug-ins and Lightroom crashes every time I open it (crashes, generates a crash report, then after a retry finally opens). It is SO buggy, Adobe should be offering rebates, not apologies for a premature release.
Please follow the below steps for crash issue in Lightroom.
First turn off the GPU from the Lightroom Preferences
Click on Edit menu
Go to Preferences
Click on the Performance Tab
Uncheck the GPU
Then, Go to General Tab
Uncheck the Option " Show Add Photo Screen"
Restart the Lightroom
Also, for Black thumbnails: Thumbnails display black in Lightroom CC 2015.2/6.2
Let us know if it helps.