Hi there.
It seems that the most recent version of the plugin may not match the checksums available for it? I reinstalled the plugin after the first check and it still did not verify. twice.

[kitten]$ wp plugin install responsive-lightbox
Installing Responsive Lightbox & Gallery (2.1.0)
Fetching pre-update site response…
-> HTTP status code: 200
-> Correctly detected closing </body> tag.
-> No uncaught fatal error detected.
Downloading installation package from https://downloads.wordpress.org/plugin/responsive-lightbox.zip&#8230;
Using cached file ‘/home/wp_fy2d7t/.wp-cli/cache/plugin/responsive-lightbox-2.1.0.zip’…
Unpacking the package…
Installing the plugin…
Plugin installed successfully.
Fetching post-update site response…
-> HTTP status code: 200
-> Correctly detected closing </body> tag.
-> No uncaught fatal error detected.
Success: Installed 1 of 1 plugins.
[kitten]$ wp cache flush
Success: The cache was flushed.
[kitten]$ wp plugin verify-checksums –all

+———————+———————————-+—————–+
| plugin_name | file | message |
+———————+———————————-+—————–+
| responsive-lightbox | assets/select2/js/select2.js | File is missing |
| responsive-lightbox | assets/select2/js/select2.min.js | File is missing |
+———————+———————————-+—————–+
Error: Only verified 13 of 20 plugins (1 failed, 6 skipped).

I feel like this is probably that the checksums needs updating and not that the version in the repo is broken. It is producing this warning though:

[Thu Sep 12 18:05:34 2019] [error] [client 66.249.65.106] FastCGI: server “/var/run/php-wp_fy2d7t.fcgi” stderr: PHP message: PHP Warning: Illegal string offset ‘type’ in /home/wp_fy2d7t/kittenkamala.com/wp-content/plugins/responsive-lightbox/includes/class-frontend.php on line 1893

¯\_(ツ)_/¯

Thanks!