Steps to reproduce:
1. Open UI Builder window
2. In Hierarchy add Visual Element
3. In Inspector > Bindings > Data Source Path add “...”
4. Press Enter
5. Observe the Console window
6. Try selecting Visual Element in Hierarchy again

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Actual results: “ArgumentException: PropertyPath: Invalid '.' character encountered at index ‘0’.” Error is thrown in the Console window, UI Builder window breaks as when selecting VisualElement continues throwing errors and unable to add other Elements to Hierarchy

Expected results: No errors should be thrown in the Console, a tooltip should be thrown that “Data Source Path only can contain letters and numbers”, UI Builder window should not break

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Reproducible with versions: 6000.0.65f1, 6000.3.3f1, 6000.4.0b3, 6000.5.0a4

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Tested on (OS): Ubuntu 24.04, macOS Silicon Tahoe 26.2