after importing database backup problems

Hello i had my old site site1 and i have bought new domain site2.com i have replace all site1.com with site2.com in site1’s database using find and replace command. But still due to some plugins of old i get error “Encountered an error, site misconfiguration” of /wp-admin/plugins.php

after i remove or disable specific plugin site is back without any problem so can anyone suggest me ? how to clear all old plugin settings ? please help me.