I\'m just new to pgAdmin, so I don\'t really know what causes these errors:
ERROR: relation \"ongoingprojects\" doe
For me the issue was having a schema named differently than the database.
Two solutions:
1) Modify schema name to match db name
or
2) Prepend table in query with schema name, eg: SELECT * FROM my_schema.ongoingProjects;
SELECT * FROM my_schema.ongoingProjects;