STOCKHOLM—Sweden’s center-left, minority government failed in several aspects of its handling of the COVID-19 pandemic, parliament’s constitutional committee said on Thursday. The government was slow to put in place a testing and tracing system, failed to protect the elderly and there was a lack of clear lines of responsibility between national and local authorities, the committee said. It did not comment on Sweden’s controversial no-lockdown strategy. “It is … clear that Sweden was not sufficiently prepared before [the pandemic] and we can learn from many of the underlying failures that have been identified,” Hans Ekstrom, deputy chairman of the committee and a Social Democrat lawmaker, told a hearing. Sweden has been an outlier in the fight against the pandemic and has opted against lockdowns, instead relying on mostly voluntary measures. The death toll has been higher than that among its Nordic neighbors, but lower than in most European countries that …