My store started 500-ing after a Magento upgrade, do you fix that too?

Yes. Upgrade-related 500s are common, a third-party module incompatible with the new version, a leftover generated/ from the old codebase, a PHP version mismatch, or a setup:upgrade / setup:di:compile that didn’t complete. We trace it the same way: read the log, reproduce on staging, isolate the module or step, and fix. If it’s broadly upgrade-related, our Magento upgrade bug-fixing service covers the full post-upgrade stabilization.