- PostgreSQL server component was installed in Plesk in Tools & Settings > Updates > Add/Remove components.
- PostgreSQL server is missing in Tools & Settings > Database servers.
Plesk Web Admin Edition license is installed on the server.
PostgreSQL and MSSQL management modules are optional for the Plesk Web Admin Edition licenses.
Apply one of the possible solutions to be able to manage PostgreSQL databases:
Upgrade Web Admin license to Web Host or Web Pro license edition using the steps from the following KB article: How to upgrade or downgrade a license between Plesk editions?