I tried to create data store and get the attached error.
Portal, server and two web adapters 10.5 are all installed on the same machine and are working.
I can see the service of data store running and I can see the ArcGISDatastore.exe running.
I can see many postgress.exe processes running.
I follow this: Create a data store—Installation Guides | ArcGIS Enterprise and fail on step 6.
It works for 5-7 minutes and give the error you can see in the attachment.
I am trying to create the relational data store only.