Hi Surapally Sravan Kumar •,
Welcome to Microsoft Q&A forum.
As I understand, you are getting error 'Msg 33293 Level 16 Cannot find the column encryption key because it does not exists or you do not have permissions' in Azure SQL DB.
Please try creating of CMK and CEK in tempdb as described here in the article:
Also refer to similar post here and let us know if this helped.
Thanks