Unable to create a virtual graph with a postgres datasource

Postgresql db is hosted on AWS RDS. The database has 111 tables.

After clicking on Create & Map, it goes into a loading state forever and mappings are not created.

I tried creating mappings in batches by selecting a set of tables to create a mapping. But this approach resulted in a virtual graph with redundant nodes and edges.
Attaching the exported data model(urn:Berry_Box:) file here for reference.

Berry_Box.zip (1.9 MB)