Error: invalid integer contant at line 445

[grince]

I just downloaded that wonderful bash-script for this wonderful idea.

I am running Debian 12, installed jq and jq2a additionally.
but when I try to start the script without any parameter (so, a random oil painting should be shown), I receive the following:

$./aic.sh
./aic.sh: line 445: 16#: invalid integer constant (error token is "16#")
Bacchic Revels, c. 1740
Johann Georg Platzer (Austrian, 1704–1761)
https://www.artic.edu/artworks/46383/bacchic-revels

this happens also a second time:
$./aic.sh
./aic.sh: line 445: 16#: invalid integer constant (error token is "16#")
Queen Philippa at the Battle of Neville's Cross, c. 1789
Benjamin West (British, born United States, 1738–1820)
https://www.artic.edu/artworks/57652/queen-philippa-at-the-battle-of-neville-s-cross