THE CONTRIBUTION WORKS FINE! The problem is that we did not follow the installation instruction correctly. I made the same mistake. the following instructions must be inserted into the database.
Database changes new as of v0.57
INSERT INTO configuration_group VALUES (40, 'Accounts', 'Configuration of Account settings', 40, 1);
INSERT INTO configuration VALUES ('', 'Purchase Without Account', 'PWA_ON', 'true', 'Allow Customers to purchase without an account', 40, 1, '2003-04-08 13:07:44', '2003-04-08 12:10:51', NULL, 'tep_cfg_select_option(array(\'true\', \'false\'),');
After I went over the installation program and followed all the instructions everything works fine.