Issue
I'm suddenly seeing database connection errors such as could not retrieve server_version: tlsv1 alert protocol version
or SSL error: tlsv1 alert protocol version (PG::Error)
.
Resolution
Users of Heroku Postgres may start seeing errors when connecting to the database if their client is using a deprecated TLS version. Heroku Postgres databases do not accept connections using TLS v1.1 or lower.
Connections to Heroku Postgres databases require using TLS v1.2 or v1.3.