run_sql: unable to run "_post_navigation.sql"

In "_post_navigation.sql": The following error occurred while executing an SQL statement:
error communicating with database: connection aborted

The SQL statement sent by SQLPage was:
WITH current_post AS (SELECT p.id_seq, t.language_code FROM post AS p JOIN translations AS t ON t.element_id = p.id WHERE p.id = CAST($1 AS TEXT)::INT AND t.element_type = 'post_post'), next_post AS (SELECT p.id, p.title, p.id_seq FROM post AS p JOIN translations AS t ON t.element_id = p.id WHERE t.element_type = 'post_post' AND t.language_code = (SELECT language_code FROM current_post) AND p.id_seq > (SELECT id_seq FROM current_post) ORDER BY p.id_seq ASC LIMIT 1) SELECT 'post?id=' || next_post.id || '&lang=' || CAST($2 AS TEXT) AS link, 'nav-right' AS id, 'chevron-compact-right' AS icon_after, next_post.title AS title FROM next_post;