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Error logs look like a wall of intimidating text at first glance, but they follow a consistent, learnable pattern.
Where to Find Them
In Plesk, error logs are available under each domain's Logs section, separated into access logs (every request) and error logs (only problems).
Reading a Log Entry
Most entries include a timestamp, an error severity level (like "Warning" or "Fatal error"), a description of what went wrong, and often the specific file and line number responsible.
Start With the Most Recent Entries
If you're troubleshooting something that just happened, the most recent log entries are almost always the most relevant — work backward from there if needed.
Look for Patterns
The same error repeating over and over (rather than a one-off) usually points to a systemic issue, like a misconfigured plugin, rather than a random fluke.
Common Error Types
"Fatal error" usually stops a page from loading entirely. "Warning" and "Notice" often don't break the page but indicate something worth fixing. "Deprecated" flags code using outdated methods that may break in a future PHP update.
When to Escalate
If a log entry doesn't clearly explain the issue, copying the exact error text into a support ticket gives our team a precise starting point instead of a vague description.
