How fast can you fix a PrestaShop store that’s down?

A store-down emergency, a blank white page or a 500, can usually be triaged within minutes and resolved the same day. We target a first response under 4 hours during cover hours (faster on a retainer). The quickest path to a fix is to send the exact error string from var/logs/ and tell us what changed last: a module install, a theme edit, or a 1.7 → 8 upgrade.