Unhandled Exception.
SQLSTATE[42000]: Syntax error or access violation: 1055 Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'rube9718_suelimauriciocoach.compras.log' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
You can find the error back in the log.