I found the problem in the web logs, the server is unable to initiate a connection between the JDBC driver and the Postgres database server.
I updated the database server to version 16 of Postgres, I assume that version 8.6 does not have this compatibility, right?
Reading the documentation, I found the information that the version above mine, 8.9 LTS, supports Postgres 9.6 to 13.
That’s probably my problem, incompatibility between the web service and Postgres