Errata:

None.

Solution:

Blanks at top are artwork on the left and artist on the right. The date in the middle is death year of artist.

Masks                                     James Ensor
Self-Portrait with Vanitas Symbols        David Bailly
Composition with Skull                    Pablo Picasso
Naked Man and Skull                       Edelfelt Albert
Carondelet Diptych                        Jan Gossaert
Skeletons Riding Bicycles                 Jose Guadalupe Posada
Death Comes to the Banquet Table          Giovanni Martinelli
La Contemplation                          Hugues Merle
The Dance of Death                        Michael Wolgemut
The Spinner                               Hans Holbein the Younger
Still-Life with a Skull                   Philippe de Champaigne

Taking the first letter of the first artwork, second letter of the second, and so on it spells out MEMENTO MORI . Translate this using telephone keypad to get 63636866674 which is the password for the lockee. This takes us to https://pastebin.com/k0Njb0HQ.

At the bottom of the puzzle, each pair of numbers is for extraction from the artist list. First number is number of artist in the list, second number is letter from name of artist. It spells out INPUT HANK AS PASTEBIN PASSWORD. Use hank as the password.