Laza,
Understood. I think my confusion was that the site uploaded and worked correctly without the trailing " / ". So I thought I'd done the right thing!
It's always confusing when some software needs the " / " and some does not, with the same question!
Ghost text in the box, "
https://example.com/ " as a clue?
Anyways, your work on the themes is exemplary. I really like the "Tiger" theme. In the past I've used Gallery, Gallery2, (looked at Zenfolio), Coppermine, and finally PIWIGO. (But I got tired of fighting PHP, Opcache, fpm, etc, hence the switch)
And I have to say that jAlbum may have a steepish learning curve, but once learned, it just plain works perfectly, very fast and clean results.
Nigel.