Hello/Hi/Greetings,
This is a new piwigo install on ubuntu 18.10.

I'm trying to post a photo to facebook. This is the URL that pops up. I blanked out the hostname:
https://www.facebook.com/sharer.php?u=h … p%3F%2F524

I get this error:
href should represent a valid URL

Something is wrong with the URL. If I paste the URL into another page I get the same error. Any help would be greatly appreciated

Piwigo version: 2.9.4
PHP version: 7.2.10-0ubuntu1
MySQL version: 15.1
Piwigo URL: http://