The 'Unity missing default layout' error typically happens when Unity cannot find or load the layout configuration files, which are usually stored in the Unity preferences folder on your system. These layout files remember the configuration of your Unity IDE such as the size and positions of different panels (like the Game View, Scene View, Inspector, Hierarchy, etc.).
A few reasons why this error might occur include:
Here are several solutions that can help fix the 'Unity missing default layout' error:
Reset Layout: The simplest solution is to reset the layout to the default settings. In Unity, you can do this by going to
Window > Layouts > Default. This will restore the default layout setting of Unity.
Reinstall Unity: If resetting doesn't work, try reinstalling Unity. It's possible that the layout files weren't correctly installed or updated in the first place. Uninstalling and reinstalling Unity can resolve this.
Check OS Permissions: If neither of the above solutions work, ensure that the Unity process has appropriate permissions to read and write files in the Unity preferences folder. The exact steps vary depending on your operating system.
Manual Restoration: As a last resort, if you have a backup of your Unity preferences folder, you can restore the layout files manually. Be very careful with this step to avoid overriding other important settings.