@Ali Alghamdi You can simply fix this problem https://github.com/apache/incubator-superset/issues/4285 So, change lines in file: /usr/hdp/current/superset/lib/python3.4/site-packages/superset/db_engine_specs.py to follow: line 137: 'con': create_engine(form.con.data.sqlalchemy_uri_decrypted, echo=False), line 882: engine = create_engine(form.con.data.sqlalchemy_uri_decrypted) ... View more

Have the same problem. In my case the "problem" was caused by authentication method. To "resolve" in my test environment I set authentication method from md5 into trust in pg_hba.conf in my Postgresql server on the database used for importing data. Another authentication methods caused the same error. I believe this is something like bug... @Ali Alghamdi, please test and let me know. ... View more