After some tests, it works with 1.4.14 and PHP7 on the bottom of it, when PHP version of Wordpress hosting is downgraded to 5.6. This version of ZP isn't very old, so probably I will try to fix this plugin, and then update ZP to 1.5

mile: I know about Zenpage, but I try to build a website using separate CMS for webpage/blog, discuss board, and photogallery

I was trying to use 4images many years ago, but Zenphoto looks like better for me with many functions

In this moment, I use Getsimple CMS on https://shift.org.pl/ and ZP on https://galeria.shift.org.pl, but I am testing migration from GS to WP, and integrate galleries below articles about trams and buses with Zenphoto, not using separate gallery scripts for webpage
Testpage with integrated photogallery from ZP is here: http://test.shift.org.pl/2018/07/16/zv155/
Plugin doesn't work with dynamic albums. It would be great function, because this is very good in ZP, you can create special albums for example via keywords under photos from many directories