“Admin Menu Editor” plays on the same field as the User Role Editor Pro “Admin menu access” add-on. They try to modify the same menu data structure simultaneously. So the conflict is very expected. In case you need extended menu modification functionality offered by Admin Menu Editor look at the Admin Menu Editor Pro and do not use “Admin menu access” add-on from URE. Admin Menu Editor Pro allows to assign to menu items custom user capabilities so there will be no need to block them, just add/revoke those capabilities to/from the roles.