Site Health and Diagnostics
Check the main site systems and find areas which need attention.
Site Health is the first place to look when something feels wrong. It gathers checks across the active site configuration.
Start with Site Health
Look for failed or warning checks and read the accompanying action before changing files manually. Presentation checks can identify missing default Resources or a Profile Menu setting which the active Header cannot render.
Use Diagnostics for detail
Diagnostics exposes deeper operational information when the summary is not enough. Use it to confirm the problem before applying a manual repair.
After a fix
Run the check again. A manual change is not complete until the built-in health view agrees that the site has returned to a healthy state.