It looks like they have also changed the pager so that .pager-last no longer exists, and only .pager-next is available to get to the next page of issues 😒
XML parsing was fixed by 87fecff
Finding the total number of pages was fixed by 3c90c66
A parsing issue remains on Drupal.org, but currently only affects the normal bug count, so 3582a32 stores a null value for an individual count if it can't be retrieved instead of aborting the whole run.