Sudden shut down of Lightroom

[yasmint]

Today while I work on photos the lightroom closes suddenly. And creative cloud logs out. It happenned repetitively .. 

How can I solve this problem please

[AxelMatt]

Please take a look here: https://helpx.adobe.com/manage-account/kb/troubleshoot-creative-cloud-sign-out-sign-in.html

If this doesn't help we need more informations about your system.

MacOS or Windows?

Which version?

Which version of Creative desktop client and Lightroom?