Browser errors
Email problems
HTTP errors
WordPress errors
All troubleshooting guides
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How to fix ERR_SSL_PROTOCOL_ERROR
The browser and server could not agree on a secure connection at all. Usually HTTPS is not set up on that port, or the…
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Why do my emails go to spam?
Most legitimate mail lands in spam for fixable reasons: missing SPF, DKIM or DMARC, a server with a poor reputation, or a site sending…
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How to fix the WordPress white screen of death
A blank page or “There has been a critical error” means PHP stopped with a fatal error. Find the plugin or theme responsible and…
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How to fix “Error establishing a database connection”
WordPress cannot reach its database. Either the login details are wrong, the database server is down, or the database itself is damaged.
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How to fix ERR_CONNECTION_REFUSED
The server answered, but nothing was listening on that port. Usually the web server is stopped, listening elsewhere, or a firewall rejects you.
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How to fix ERR_TOO_MANY_REDIRECTS
Two rules are sending visitors back and forth forever. Usually HTTP and HTTPS, or www and non-www, set differently in two places.
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How to fix “Your connection is not private”
The browser does not trust the site’s certificate. What each NET::ERR_CERT code means, and how to fix it on either side.
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How to fix DNS_PROBE_FINISHED_NXDOMAIN
The browser asked DNS for the site’s address and was told the name does not exist. Check the spelling, your own DNS, then the…
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How to fix 429 Too Many Requests
A rate limit was hit. Slow down if you are the visitor; if you run the site, decide whether the limit is protecting you…
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How to fix 404 Not Found errors on your site
A few 404s are normal. Sudden ones, or every page except the home page, point to a broken rewrite, a moved page or a…