Always ensure you have enough system memory (roughly 3-5 GB) before initiating the update, as the cumulative size of Pokémon Scarlet updates can be quite large.
If you are using a modified console (CFW like Atmosphere), use an installer such as Pokemon Scarlet -NSP--Update 3.0.1-.rar
This update was specifically designed as a "hotfix" to resolve several game-breaking issues and mechanical bugs: Always ensure you have enough system memory (roughly