I don't get an error:
% openroad
OpenROAD 1 d273d8fe01a18ded09be2a70857e3eb1475119a4
This program is licensed under the BSD-3 license. See the LICENSE file for details.
Components of this program may be licensed under more restrictive licenses which must be honored.
openroad 1> set db [odb::dbDatabase_create]
_a0f8705b65550000_p_odb__dbDatabase