I suddenly got a notification of my CPU usage being high, and when I check my website - it was down.
And, then tried to log in to FTP to deactivate WordPress plugins to see if it's an issue with WordPress (but couldn'...
I've successfully migrated to Digital Ocean from Cloudways (was utilizing DO as well).
However, except the homepage every other page shows 404 error. (reference: https://stackoverflow.com/questions/5182534/wordpress-i...
Got a response from the official DO support:
Replaced my original .htacess content (generated by WordPress) with this and it worked.