Unable to install v1.0.16 on Drupal 11

Hi kenrbnsn, GLightbox module has a new dependency DOMpurify, use option -W (--with-all-dependencies) to update the module with new dependency:
composer update drupal/gLightbox -W

The problem is related to newly added (it was not present on 1.0.15):

"require": {
      "drupal/core": "^8.8 || ^9 || ^10",

This disallows installation on sites running D11. But the module seems to be working fine, so it may be a simple matter of broadening compatibility in composer.json.

Added patch of update composer file with drupal 11 version

Good catch, david-urban! I added a new release with a fix:
https://www.drupal.org/project/glightbox/releases/1.0.17 →