Steps to reproduce:

1. Create a 2D project
2. Add any 2D game object for example "Capsule"
3. Go to "Window" menu and select "Search" ->"New Window"
4. Type "Capsule" into search input section and click "Enter"
5. Click save button and select "Save Project"
6. In "Save search query" popup delete proposed name and  enter space symbol
7. Observe "Save" button
8. Click it, because  the button becomes active
9. Observe "Console" window

Expected result: Validation shouldn't allow to save the query. Added screenshot in the "Attachments" section.

Actual result:  Console displays errors. Added video in the "Attachments" section.

Note: this happens only on Mac. On Windows the SavePanel dialog doesn't allow empty asset name.

Reproducible with: 2023.1.0b3, 2022.2.6f1, 2021.3.18f1, 2021.3.1f1.
Not reproducible with: 2020.3.45f1 (this stream has no this window).

Errors:

Assets/ .asset' is not a valid asset file name.
UnityEditor.GenericMenu:CatchMenu (object,string[],int)

Failed to save search query at Assets/ .asset
UnityEditor.GenericMenu:CatchMenu (object,string[],int) (at /Users/bokken/build/output/unity/unity/Editor/Mono/GUI/GenericMenu.cs:127)