ERROR: invalid byte sequence for encoding - Mailing list pgadmin-support

We are using pgAdmin 4 2.0/2.1. Allmost all of our databases using
Encoding LATIN1. We have the problem, that when we want to show a table
definition in the SQL-Tab, an error message pops up:

Error retrieving the information - INTERNAL SERVER ERROR
ERROR: invalid byte sequence for encoding "LATIN1":0x00

Here some output:

show client_encoding;
 client_encoding
-------------------
 UNICODE

show server_encoding;
 server_encoding
------------------
 LATIN1

show lc_collate;
 lc_collate
-------------
 de_DE

Is there an solution?