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HTTP 500 on PrestaShop 9: reading the log instead of guessing

· 1 min read · Published by Rafa

reparacionmovil.es on PrestaShop 9 returned HTTP 500 with no useful message on the storefront. The log, not a theme swap, showed what to revert.

Live case: reparacionmovil.es on PrestaShop 9. The storefront returned HTTP 500. Visitors saw a generic error. Sales stop immediately. Guessing “cache” or “reinstall the theme” wastes the hour you still have.

How I actually debug it

Enable or read the PrestaShop / PHP error log on the host. Identify the file and module in the stack. Disable the last change (module, override, PHP bump) on staging or with a controlled rollback. Confirm the front loads. Then decide whether the module gets a patch or a replacement.

A 500 after a PrestaShop 9 module update is often an incompatible hook or a missing service. The log names it. The storefront will not.

Urgent support · PrestaShop 9 migration · Request a quote.

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