Steps to reproduce:
# Create a 2D project
# Add any 2D game object for example "Capsule"
# Go to "Window" menu and select "Search" ->"New Window"
# Type "Capsule" into search input section and click "Enter"
# Click save button and select "Save Project"
# In "Save search query" popup delete proposed name and  enter space symbol
# Observe "Save" button
# Click it, because  the button becomes active
# 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)