https://errorzap.com/tags/debugging/Recent content in Debugging on Error ZapHugoen-usTue, 09 Jun 2026 00:00:00 +0000https://errorzap.com/posts/the-cert-only-an-api-could-renew/Tue, 09 Jun 2026 00:00:00 +0000https://errorzap.com/posts/the-cert-only-an-api-could-renew/A FreePBX user panel served an expired TLS cert, every reload swore it was fixed, and the only thing that actually moved the needle was calling the cert module’s own regeneration API.https://errorzap.com/posts/the-app-that-wouldnt-open-after-an-update/Fri, 05 Jun 2026 00:00:00 +0000https://errorzap.com/posts/the-app-that-wouldnt-open-after-an-update/A desktop app auto-updated, swallowed its own window, and hung forever — and the fix had nothing to do with the install.https://errorzap.com/posts/seven-network-gotchas-that-look-like-ghosts/Tue, 02 Jun 2026 00:00:00 +0000https://errorzap.com/posts/seven-network-gotchas-that-look-like-ghosts/The network isn’t haunted — it’s orphaned ports, stale DNS, and a firewall eating your return path. Run the checklist before you light the candles.https://errorzap.com/posts/two-apps-one-port/Sat, 18 Apr 2026 00:00:00 +0000https://errorzap.com/posts/two-apps-one-port/Edits vanished, reads lied, and nothing in the logs was wrong — because two copies of the same app were quietly knife-fighting over the same TCP port.https://errorzap.com/posts/the-bot-that-hung-because-of-ipv6/Wed, 15 Apr 2026 00:00:00 +0000https://errorzap.com/posts/the-bot-that-hung-because-of-ipv6/A Telegram bot kept freezing on outbound calls with no error — turns out a NIC with IPv6 addresses but no working IPv6 routing was quietly killing every request.https://errorzap.com/posts/the-payment-that-showed-zero-but-wasnt/Sun, 08 Mar 2026 00:00:00 +0000https://errorzap.com/posts/the-payment-that-showed-zero-but-wasnt/A recorded payment rendered as ‘$0.00 applied’ and everyone assumed the money vanished — but the ledger had been right the whole time.