Problem description

Hello,

I installed the extension according to the instructions but when creating it (CREATE EXTENSION pg_pathman WITH SCHEMA pathman;) I get an error:
ERROR: extension "pg_pathman" has no installation script nor update path for version "1.5"

Environment

SELECT * FROM pg_extension;
plpgsql
btree_gist
dblink
pg_stat_statements

SELECT version();
PostgreSQL 10.17 on x86_64-redhat-linux-gnu, compiled by gcc (GCC) 8.3.1 20191121 (Red Hat 8.3.1-5), 64-bit

SELECT pgpro_version();
ERROR: function pgpro_version() does not exist

SELECT pgpro_edition();
ERROR: function pgpro_edition() does not exist

SELECT get_pathman_lib_version();
ERROR: function get_pathman_lib_version() does not exist

Help, please!