### Godot version

4.0 dev Beta 10

### System information

MacBook Pro M1 Max

### Issue description

After I imported font.ttf file and move it from one folder to another under ://res godot suddenly crashed, and it still crashes after restart.

### Steps to reproduce

Import some font.ttf file and try to move into different folder

### Minimal reproduction project

N/A
FontFallback *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, Ref<Image>());
	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);
	ERR_FAIL_COND_V(!_ensure_cache_for_size(fd, size), Ref<Image>());
	ERR_FAIL_INDEX_V(p_texture_index, fd->cache[size]->textures.size(), Ref<Image>());
	const ShelfPackTexture &tex = fd->cache[size]->textures[p_texture_index];
	return Image::create_from_data(tex.texture_w, tex.texture_h, false, tex.format, tex.imgdata);
}
void TextServerFallback::_font_set_texture_offsets(const RID &p_font_rid, const Vector2i &p_size, int64_t p_texture_index, const PackedInt32Array &p_offsets) {
	ERR_FAIL_COND(p_offsets.size() % 4 != 0);
	FontFallback *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);
	MutexLock lock(fd->mutex);
	Vector2i size = _get_size_outline(fd, p_size);
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	ERR_FAIL_COND(p_texture_index < 0);
	if (p_texture_index >= fd->cache[size]->textures.size()) {
		fd->cache[size]->textures.resize(p_texture_index + 1);
	}
	ShelfPackTexture &tex = fd->cache[size]->textures.write[p_texture_index];
	tex.shelves.clear();
	for (int32_t i = 0; i < p_offsets.size(); i += 4) {
		tex.shelves.push_back(Shelf(p_offsets[i], p_offsets[i + 1], p_offsets[i + 2], p_offsets[i + 3]));
	}
}
PackedInt32Array TextServerFallback::_font_get_texture_offsets(const RID &p_font_rid, const Vector2i &p_size, int64_t p_texture_index) const {