An error message on a website does not mean the whole site must be rebuilt. An expired certificate, changed PHP version, missing plugin, DNS fault, full disk or incorrect configuration can all look from the outside like “the site is broken”.
Diagnosis is therefore more important than immediately migrating or redesigning. First establish which layer is failing and which parts are still intact.
Check whether the domain name still points to the right place, whether the web server responds and which HTTP status or error message is returned. Then check the certificate, hosting account, storage space, PHP or runtime version, CMS, database and recent changes.
Before carrying out major updates, make a copy of the files and database if that is still possible. A hurried upgrade can make the original fault harder to reconstruct.
Not automatically. A new site can remove old problems, but it can also lose content, URLs, metadata, accessibility and historical references. Sometimes a targeted repair is the quickest way to restore continuity first and then decide calmly what should change.
For joint technical investigation, Digital can be relevant or, when hardware or equipment is also involved, Basic repair.
Then it is useful to inspect the logs and the exact error instead of disabling plugins at random. On older WordPress sites, for example, one plugin or theme may be incompatible with a newer PHP version while the rest of the site remains usable.
A temporary compatibility repair can be responsible in order to make the site reachable again, provided the remaining technical debt and the required next step are documented afterwards.
No. Recovery and hosting choice are two separate decisions. Access and operation can be restored first; afterwards you can compare whether the current provider is still appropriate.
When someone deliberately wants to hand over part of the technical administration after recovery, the approach is described under Independence and technical continuity.