Looker 22.4, releasing in March 2022, will promote the 4.0 API from beta to generally available (GA). Among the changes (check the full list), space is now deprecated and replaced by folder. If you are currently using Gazer, here are the two approaches to mitigate the changes
(1) Update to the latest version of Gazer from the repository
(2) Add --api_version 3.1 to your gzr commands
Note: Gazer is not supported by Looker, please file issues in the Gazer repository for any issues and feedback.