### 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_V(!fd, false);
	MutexLock lock(fd->mutex);
	return fd->msdf_range;
}
void TextServerAdvanced::_font_set_msdf_size(const RID &p_font_rid, int64_t p_msdf_size) {
	FontAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);
	MutexLock lock(fd->mutex);
	if (fd->msdf_source_size != p_msdf_size) {
		_font_clear_cache(fd);
		fd->msdf_source_size = p_msdf_size;
	}
}
int64_t TextServerAdvanced::_font_get_msdf_size(const RID &p_font_rid) const {
	FontAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);
	MutexLock lock(fd->mutex);
	return fd->msdf_source_size;
}
void TextServerAdvanced::_font_set_fixed_size(const RID &p_font_rid, int64_t p_fixed_size) {
	FontAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);
	MutexLock lock(fd->mutex);
	fd->fixed_size = p_fixed_size;
}
int64_t TextServerAdvanced::_font_get_fixed_size(const RID &p_font_rid) const {