Dear @abaketti,
Thank you for the report. The gallery won’t load in Chrome either.
Please try troubleshooting the issue with Health Check & Troubleshooting.
This will help identify any possible conflicts with other plugins or the theme.
Sincerely,
Hello @abaketti,
I had the same problem, but in the end I caught the root cause for it.
It turned out that previously configured limitations for the /wp-admin directory on my server were preventing the end users accessing the following script: /wp-admin/admin-ajax.php.
Please refer to my topic for more detailed explanation:
https://wordpress.org/support/topic/image-enlarge-not-working-after-update/
I see that your script is publicly accessible though:
# curl http://abkmv.net/wp-admin/admin-ajax.php
0
However, you can look for any codes different from ‘200’ in the site access log while trying to open a photo. It could be similar issue as mine.