v4.0.0-beta.401

• fix: better file storage handling when loading files from server
• fix: email notifications refactored
• fix: compose manual validation process
• fix: horizon job checker command
• fix: proxy restart process

What's Changed

• v4.0.0-beta.401 by @andrasbacsai in #5457

Full Changelog: v4.0.0-beta.400...v4.0.0-beta.401