anabasso

I had that same problem. I uninstalled the plugin and installed it again and it worked ??

I just realised it was the server after all (shame on me). The HTML pages I was able to access were in my cache. Thank you so much for answering esmi!

Thanks for looking into it.
The theme I’m using had originally a different lightbox plugin, which I disabled to install SLB.

This issue could be the result of an interference from another plugin, from the theme or from the code I’ve changed, but I’m afraid I wouldn’t know which one is it.

In any case, the solution you proposed is brilliant and everything is working fine now ??

It appears to be it, of course!
Thank you very much.