Installing export template fails and displays empty "Warning!" window

[Meorge]

Tested versions

• Reproducible in: 4.4.dev [893bbdf]

System information

Godot v4.4.dev (893bbdf) - macOS 15.1.1 - Multi-window, 2 monitors - Vulkan (Forward+) - dedicated AMD Radeon Pro 5500 XT - Intel(R) Core(TM) i7-10700K CPU @ 3.80GHz (16 threads)

Issue description

I'm unable to add an export template file to Godot 4.4.dev. Attempting to do so results in a blank window that says "Warning!" in the title bar and has no content.

Godot.Install.Export.Template.Gives.Blank.Warning.mp4

Steps to reproduce

Build an export template:

scons platform=macos target=template_release arch=x86_64 generate_bundle=yes

Open a project in Godot, then go to "Editor > Manage Export Templates..." In the window that appears, choose "Install from File". Choose the built export template.

A small blank window will appear, with the title "Warning!". Clicking on the window may cause it to close (I haven't determined exact criteria for this).

Minimal reproduction project (MRP)

N/A

Edit: I realized the version I originally reported this with was my own feature branch. I went back to master and verified the bug still occurs there.

[AThousandShips]

Thank you for reporting! This was already reported in:

• Empty warning popup window when loading an invalid templates archive file #85862

Closing to keep things in one place