Login page blank, postgresql@10-main.services is loaded but not active not running

Hi all, use nextcloud on an Oracle Virtual box virtual machine. Nextcloud has always worked properly, until the machine has unexpectedly restarted causing a blank page on login.
The data I checked there are, launching systemctl I noticed that postgresql service is ok but postgresql@10-main.service is “loaded” but not “active and running”. How can I solve the problem?

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Nextcloud version 13.0.4:
Operating system and version Ubuntu 18.04
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