could not start WAL streaming: ERROR: replication slot XXX does

If you do see the slot under the slot_name column, check the database column This should match the database that you have added in the setup form The solution

This parameter does not apply to physical slots It will be ignored with slot_type Examples¶

replication slot already exists does not exist If it already exists, it must be empty -S slotname --slot=slotname This option can only be used together with -X stream

replication slot postgres You must drop the logical replication slot in the primary server if the corresponding subscriber no longer exists Otherwise, the WAL files