QGIS can't open three tables from sample database

[haubourg]

I'm using https://github.com/QGEP/data/raw/demodata/qgep_demodata.backup
and qgis fails to open 3 tables :

[tudorbarascu]

For the vw_network_segment view it's on account of #28 so you can easily past that by doing a REFRESH MATERIALIZED VIEW qgep.vw_network_segment;

I can replicate on the other two views without a solution though.
@m-kuhn any ideas?

[m-kuhn]

Moved to main issue tracker (this one is for the docs).