Why is the Component Library and Component Browser of the App Designer not displayed in MATLAB R2023a?

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If I open the App Designer when using the "appdesigner" command to generate a new app, the App Designer opens but the Component Library, as well as the Component Browser, are missing. This happens only on one of our machines. See the following screenshot where the complete "sidebars" are missing:

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MathWorks Support Team
MathWorks Support Team am 25 Sep. 2023
The problem lies in persisting the panel layouts. The UIContainer framework saves the side panel layout information in a JSON file, which may have become corrupted on the machine.
To resolve the issue, please follow the steps listed below:
1. Locate the "AppDesignerMainPanelLayout.json" file. The path to the file should be similar to the following:
C:\Users\<User Account Name>\AppData\Roaming\MathWorks\MATLAB\R2023a\
2. Delete the "AppDesignerMainPanelLayout.json" file.
3. Restart MATLAB.
4. Launch MATLAB App Designer.

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