I am using PostgreSQL 13 Beta 3 on (windows.8/*64bit). I want to add timescaledb extension. My "postgresql.conf" directory is correct but every time i try to install the extension, I get a message which is attached. I had also changed Environment Address to "C:\Program Files\PostgreSQL\13\bin" [The address of pg_config.exe", but nothing changed. Is there a possibility that i have to use from postgreSQL V.12 as mentioned in the installation instruction? enter image description here Thank you in advance for your help and guide