To recover from a backup, first ensure these external services are running correctly and contain the desired data:
composer install
Composer tracks the exact versions in the composer.lock file and reinstalls the same set of versions
Run this command to check for outdated library versions.
composer outdated
Red entries are minor or patch releases and usually recommended. Yellow entries are major releases. These can break the depending applications.
Cross-check with the why-not command
composer why-not sabre/xml 4.0.0
sabre/dav 4.4.0 requires sabre/xml (^2.0.1)
sabre/vobject 4.5.1 requires sabre/xml (^2.1)