### 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
FontAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);
	MutexLock lock(fd->mutex);
	fd->script_support_overrides[p_script] = p_supported;
}
bool TextServerAdvanced::_font_get_script_support_override(const RID &p_font_rid, const String &p_script) {
	FontAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);
	MutexLock lock(fd->mutex);
	return fd->script_support_overrides[p_script];
}
void TextServerAdvanced::_font_remove_script_support_override(const RID &p_font_rid, const String &p_script) {
	FontAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);
	MutexLock lock(fd->mutex);
	fd->script_support_overrides.erase(p_script);
}
PackedStringArray TextServerAdvanced::_font_get_script_support_overrides(const RID &p_font_rid) {
	FontAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, PackedStringArray());
	MutexLock lock(fd->mutex);
	PackedStringArray out;
	for (const KeyValue<String, bool> &E : fd->script_support_overrides) {
		out.push_back(E.key);
	}
	return out;
}
void TextServerAdvanced::_font_set_opentype_feature_overrides(const RID &p_font_rid, const Dictionary &p_overrides) {