### 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->mipmaps;
}
void TextServerAdvanced::_font_set_multichannel_signed_distance_field(const RID &p_font_rid, bool p_msdf) {
	FontAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);
	MutexLock lock(fd->mutex);
	if (fd->msdf != p_msdf) {
		_font_clear_cache(fd);
		fd->msdf = p_msdf;
	}
}
bool TextServerAdvanced::_font_is_multichannel_signed_distance_field(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;
}
void TextServerAdvanced::_font_set_msdf_pixel_range(const RID &p_font_rid, int64_t p_msdf_pixel_range) {
	FontAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);
	MutexLock lock(fd->mutex);
	if (fd->msdf_range != p_msdf_pixel_range) {
		_font_clear_cache(fd);
		fd->msdf_range = p_msdf_pixel_range;
	}
}
int64_t TextServerAdvanced::_font_get_msdf_pixel_range(const RID &p_font_rid) const {