“Your PHP installation appears to be missing the MySQL extension which is required by WordPress”
Severity: Critical · Fix time: 15–60 min · Skill level: Advanced"Your PHP installation appears to be missing the MySQL extension which is required by WordPress" is a critical startup error that prevents WordPress from initializing its database connection entirely...
413 Request Entity Too Large
Severity: Major · Fix time: 5–15 min · Skill level: Intermediate413 Request Entity Too Large — also written as "413 Content Too Large" in newer HTTP specs — is an error that appears when the data you're sending to the server exceeds the maximum request body size the server is configured to accept...
429 Too Many Requests
Severity: Major · Fix time: 5–15 min · Skill level: Intermediate429 Too Many Requests is an HTTP status code that means a client — a browser, a bot, a plugin, or an API consumer — has sent more requests than the server or an intermediary layer is willing to accept within a defined time window...
504 Gateway Timeout
Severity: Critical · Fix time: 15–60 min · Skill level: Intermediate504 Gateway Timeout is an HTTP status code that appears when one server acting as a gateway or proxy doesn't receive a timely response from an upstream server...
Cloudflare 520 error
Severity: Critical · Fix time: 15–60 min · Skill level: AdvancedThe Cloudflare 520 error — officially titled "Web Server Returned an Unknown Error" — means Cloudflare successfully connected to your origin server but received a response it couldn't parse or interpret: an empty body, a reset connection, malformed headers, or an HTTP response without a status code...
Cloudflare 521 error
Severity: Critical · Fix time: 5–15 min · Skill level: IntermediateThe Cloudflare 521 error — "Web Server Is Down" — means Cloudflare attempted to open a TCP connection to your origin web server and the connection was actively refused...
Cloudflare 522 error
Severity: Critical · Fix time: 15–60 min · Skill level: IntermediateThe Cloudflare 522 error — "Connection Timed Out" — means Cloudflare was unable to complete a TCP connection to your origin web server within the allowed time window...
Cloudflare 524 error
Severity: Critical · Fix time: 15–60 min · Skill level: IntermediateThe Cloudflare 524 error — "A Timeout Occurred" — means Cloudflare successfully established a TCP connection to your origin web server and the origin acknowledged the request, but the origin didn't send back a complete HTTP response within Cloudflare's timeout window...
Connection timed out
Severity: Major · Fix time: 15–60 min · Skill level: IntermediateConnection timed out is a WordPress error that appears when the server takes too long to respond to a browser's request — so long that the browser gives up waiting...
DNS_PROBE_FINISHED_NXDOMAIN
Severity: Critical · Fix time: 5–15 min · Skill level: BeginnerDNS_PROBE_FINISHED_NXDOMAIN is a browser error — most visible in Chrome — that means the domain name you're trying to reach could not be found in the Domain Name System...
