Which version of Lightroom are you using?
What is your Operating system?
Lightroom generally crashes if you have incompatible external devices connected.
Remove(Phone,Tablet,External drives ) and open Lightroom again
May I know what is the version of the Lightroom.?
And are you using a windows or mac.
Adobe CC on Windows 10. My phone was connected, I just removed it. Let me see
You are so correct. I removed the phone and it is fixed now. Thanks so much. My phone is Android Galaxy S5 from Samsung.