postgrex.protocol failed to connect
This happened to me twice, after macOS crashed. Most recently I used this: Fix 1 Run postgres -D /usr/local/var/postgres Copy the number after PID if you see something like this: FATAL: lock file "postmaster.pid" already exists HINT: Is another postmaster (PID 379) running in data directory "/usr/local/var/postgres"? kill -9 PID with the process # in place of PID. The steps that worked for me previously: Fix 2 brew update brew upgrade brew postgresql-upgrade-database
