I updated to the latest WP version and discovered that I was unable to access the option on the setting page. I aldo updated to the last version of the Tempera template. Then I installded the settings plugibn to fix this and it seemed to wordk (could access settings) but on the Presentation page the slides were no longer vissible although correctly defined on the settings page. I rolled back to an older version of the tenplate from backup and fixed it for this moment.
