How I Fixed a 503 Service Unavailable Error After VPS Renewal (Apache + PHP-FPM)
Recently I ran into a frustrating issue: after renewing my VPS, my website started returning “503 Service Unavailable.” I hadn’t changed anything on the server, so at first it was confusing and alarming. Here’s what happened, why it happened, and how I fixed it — step by step. I’m sharing this so it can help…