### Godot version

4.0.dev (ba9491f87)

### System information

Windows 11 Chrome 109.0.5414.75 (Official Build), iOS 16.2 Safari

### Issue description

When exporting a simple project for Web with any GDScript like following:
```gdscript
extends Control

```
will print the following error to the console:
```
USER ERROR: U_ILLEGAL_ARGUMENT_ERROR
   at: _is_confusable (modules\text_server_adv\text_server_adv.cpp:6151)
```

![image](https://user-images.githubusercontent.com/173001/214089154-d88f3f44-b670-41ec-9743-30627677968e.png)

For more complex project, following additional errors are showing:
```
USER ERROR: U_FILE_ACCESS_ERROR
   at: _spoof_check (modules\text_server_adv\text_server_adv.cpp:6174)
USER ERROR: U_ILLEGAL_ARGUMENT_ERROR
   at: _is_confusable (modules\text_server_adv\text_server_adv.cpp:6151)
```
When I've inserted `print_line(p_string)` at text_server_adv.cpp line 6172, following logs are collected:
![image](https://user-images.githubusercontent.com/173001/214091164-cb5af630-56d2-446e-b1c4-dc20066565d5.png)

It seems that the identifiers of *.gd files are printed to the console.


### Steps to reproduce

1. Open minimal reproduction project.
2. Exports to Web.
3. Open exported site with Chrome and open developer console.
4. Following error logs will be seen (reproduced): `USER ERROR: U_ILLEGAL_ARGUMENT_ERROR`

### Minimal reproduction project

[text_server_adv_error.zip](https://github.com/godotengine/godot/files/10481582/text_server_adv_error.zip)

FontTexturePosition ret;
	int mw = p_width;
	int mh = p_height;
	ShelfPackTexture *ct = p_data->textures.ptrw();
	for (int32_t i = 0; i < p_data->textures.size(); i++) {
		if (p_image_format != ct[i].format) {
			continue;
		}
		if (mw > ct[i].texture_w || mh > ct[i].texture_h) { 
			continue;
		}
		ret = ct[i].pack_rect(i, mh, mw);
		if (ret.index != -1) {
			
		}
	}
	if (ret.index == -1) {
		
		int texsize = MAX(p_data->size.x * p_data->oversampling * 8, 256);
		texsize = next_power_of_2(texsize);
		if (p_msdf) {
			texsize = MIN(texsize, 2048);
		} else {
			texsize = MIN(texsize, 1024);
		}
		if (mw > texsize) { 
			texsize = next_power_of_2(mw);