Thread:Project:Support desk/Collection Extension: RuntimeError: command failed with returncode 256/reply (16)

Setting $wgScriptPath = "http://server_name" messed up my installation. If you, like me, do not want to use any other value but blank, follow codedaves advise - https://github.com/pediapress/Collection/issues/1#issuecomment-3352465

In "extensions/Collection/Collection.body.php", function "renderCollection"

'base_url' => 'http://server.name' # No slash at end

and voilà, the book renders.