Encoding error while trying to examine table

Am on a Macbook running Sierra hitting a pgsql 9.5 on debian 4.7.2.
When I click on a table I get this error in a popup.

I do NOT get this error when connecting to databases on my laptop.

Here's an output from psql on the db on the debian box:

show lc_collate ;lc_collate
-------------en_US.UTF-8

ERROR: invalid byte sequence for encoding "UTF8": 0x00

I searched the archive and saw something similar but different, not
exactly like mine.

Any suggestions?