Can't open View->DBA Menu in SQL Developer (Oracle 12C Standard Edition Installed)
I faced same problem, solved by: Windows->reset windows to factory settings. After that everything worked fine
goto Menu of the Sql Developer windows-->Reset the Windows to Factory Settings
and then goto view menu ----> click DBA
it works.(Version 17.2.0.188)
Selecting the View->DBA menu item displays the "DBA" panel, on the left side of the SQL Developer window and somewhere below the "Connections" panel; the exact placement may vary a bit depending on which other panels you have displayed:
You then need to add a connection in that window' if you click the green plus sign you can choose an existing connection to add to this panel. Once you've done that you can expand the sections to see the tablespaces:
