Cause
Most common reasons:
The PostgreSQL cluster for Flexi does not exist
only the default cluster
mainexistsincorrect or missing Flexi configuration (e.g.
flexi-server.xml)corrupted installation
Solution
Step 1 – Verify PostgreSQL clusters
pg_lsclusters
Check whether the cluster used by Flexi appears in the output (typically one other than main).
Step 2 – Check the Flexi configuration
sudo cat /etc/flexi/flexi-server.xml
Verify:
the cluster name / port
that it matches an existing cluster from
pg_lsclusters
Step 3 – Check the logs
👉 If you are unsure how to proceed, please send these logs to podporaflexi@abra.eu.