My site is built on Opencart. I did a migration of server from WAMP to LAMP on 1st week of November. After setting it up on LAMP, I restored the webfiles from 31st Oct (on WAMP) and did over-write on the LAMP server.
The site is showing a lot of errors. Please note that I did not take a recent back up of the LAMP server after migration. I also don't have backup of any db (.sql) files. I have webfiles backup of 31-10 and 9 Nov. Restoring any of that versions and getting site live is the priority.