Cannot declare class PlacemarkVisualization

Ie my extension works as expected. And you don't have problem with my extension.

I have a problem with the plugin (two maps in one page). My link is
socolis.gr/index.php/en/destinations/28-aegean-sea
I use Regular Labs Tabs

I don't know why you have only one map. In code I can see 2 divs for maps, but only one initialization map code (for map 2).

Here my link on my test site
test.zhuk.cc/index.php/zhosmmap-main/om-...-article#tab-title-1
As you can see 2 tabs with 2 maps.
My call is

I found where the problem is
My first code is {tab Route 1}{zhosmmap:2}{tab Route 2}{zhosmmap:4}{/tabs}
and not showing Route 1 map
The new code is {tab Route 1}{zhosmmap:2}{tab Route 2}{zhosmmap:5}{/tabs}
and works.
Map 5 is clone of 4 with no placemark. The error occured when second map has placemarks.

As you can see my maps with placemarks.
In some case your pag doesn't contain any code for map

This happens when the placemark has on the integation>prepare content.
I think now is Ok