### Tested versions

Godot Engine v4.2.stable.official.46dc27791

### System information

Windows 10

### Issue description

When exporting to web, Godot fails with this error in the console:

> scene/main/window.cpp:884 - Attempting to make child window exclusive, but the parent window already has another exclusive child. This window: /root/@<!-- -->EditorNode@<!-- -->17120/@<!-- -->Panel@<!-- -->13/@<!-- -->ProjectExportDialog@<!-- -->559/@<!-- -->VBoxContainer@<!-- -->137/@<!-- -->AcceptDialog@<!-- -->411, parent window: /root/@<!-- -->EditorNode@<!-- -->17120/@<!-- -->Panel@<!-- -->13/@<!-- -->ProjectExportDialog@<!-- -->559, current exclusive child window: /root/@<!-- -->EditorNode@<!-- -->17120/@<!-- -->Panel@<!-- -->13/@<!-- -->ProjectExportDialog@<!-- -->559/@<!-- -->ProgressDialog@<!-- -->17444

![a](https://github.com/godotengine/godot/assets/2000051/bf9d22aa-d3fe-4e11-bff6-c387e740fe90)

This happens for newly created empty projects.


### Steps to reproduce

1. Open the attached project (or create a new project).
2. Project->Export->Export All
3. Observe the console error.  No output files are generated.


### Minimal reproduction project (MRP)

[export_test.zip](https://github.com/godotengine/godot/files/13574810/export_test.zip)

f->seek(header_pos + 16);
		uint16_t opt_header_size = f->get_16();
		
		f->seek(f->get_position() + 2 + opt_header_size);
	}
	
	int64_t section_table_pos = f->get_position();
	bool found = false;
	for (int i = 0; i < num_sections; ++i) {
		int64_t section_header_pos = section_table_pos + i * 40;
		f->seek(section_header_pos);
		uint8_t section_name[9];
		f->get_buffer(section_name, 8);
		section_name[8] = '\0';
		if (strcmp((char *)section_name, "pck") == 0) {
			
			
			f->seek(section_header_pos + 8);
			f->store_32(8);
			f->seek(section_header_pos + 16);
			f->store_32(p_embedded_size);
			f->seek(section_header_pos + 20);
			f->store_32(p_embedded_start);
			found = true;
			break;
		}
	}
	if (!found) {
		add_message(EXPORT_MESSAGE_ERROR, TTR("PCK Embedding"), TTR("Executable \"pck\" section not found."));
		return ERR_FILE_CORRUPT;