# Troubleshooting

> Find your symptom, then the fix.

Source: https://veldhost.eu/docs/troubleshooting

- [White screen or "500 Internal Server Error"](https://veldhost.eu/docs/white-screen-or-500.md): Your site shows a blank page or a 500 error. The reason is in the Logs tab; here is where to look and what usually fixes it.
- ["502 Bad Gateway" after a deploy](https://veldhost.eu/docs/502-after-deploy.md): Your site answers 502 Bad Gateway after a deploy or a runtime switch. Your app is not answering the web server; here is how to find out why.
- [A deploy failed](https://veldhost.eu/docs/deploy-failed.md): The Deploys tab says "Last deploy failed". Read where it stopped and why, then fix the cause and deploy again.
- [My site is slow](https://veldhost.eu/docs/site-is-slow.md): Find out whether the time goes in your app, in the browser or in traffic you did not ask for, using the Analytics tab.
- ["Allowed memory size exhausted" / out of memory](https://veldhost.eu/docs/out-of-memory.md): A PHP memory error, "JavaScript heap out of memory", or out-of-memory kills on the Analytics tab: which limit you hit and how to fix it.
- [A site import is stuck](https://veldhost.eu/docs/import-stuck.md): Your site import has sat on its upload, "Queued" or "Moving your site in" for too long. What each state means and how to get it moving.
- [My domain doesn't open my site](https://veldhost.eu/docs/domain-not-resolving.md): Your site works on its veldhost address but not on your own domain. Find out where the domain points and fix it.
- [HTTPS certificate still pending](https://veldhost.eu/docs/https-certificate-pending.md): The Certificate column says it is on its way, failed, or will not renew. What each state means and what to do.
- [My email lands in spam](https://veldhost.eu/docs/email-goes-to-spam.md): Mail you send from your domain arrives in junk folders. Check the four records receivers judge you by.
- [Mailbox full](https://veldhost.eu/docs/mailbox-full.md): People get their mail to you returned, or your mail app says the mailbox is full. Make room or give the mailbox more storage.
- [A job or pipeline failed](https://veldhost.eu/docs/job-or-pipeline-failed.md): A run on the Runs page says Failed or Skipped. Read its error, then fix the cause: SQL, access, the run budget or the spend cap.
- [Domain dark after DNSSEC or a nameserver change](https://veldhost.eu/docs/dnssec-broke-my-domain.md): The domain stopped resolving for many visitors after a nameserver move or turning on DNSSEC. Find the DS record that no longer matches.