Investigate Loading Problems from the Error and Affected Pages
Record the URL, error message, and affected pages when a website fails to load. A whole-site outage differs from a missing page or image.
Compare the timing with recent changes and correct the relevant cause. Several simultaneous changes can obscure what happened.
Record the URL and Error
A 404 response means the requested resource was not found. Check mistyped URLs and links to removed pages, then correct the destination. HTTP status codes help identify response issues. (MDN: HTTP status codes)
Distinguish browser connection errors from received HTTP responses.
Compare Publication, Contracts, and Changes
For a correct but unavailable URL, examine service status, domain management, and publishing settings. Compare the account’s contract information with the domain in use.
If only some devices fail, test the same URL with another connection or browser to establish the affected environment.
Check Entry Points and Links after the Fix
Check the homepage and signup links as well as the fixed page. For missing images, examine the image URL and viewing permissions.
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