I there a problem with the map?

I am programming a new map with Leaflet and Drupal and suddently the map is not shown correctly.
There are mancing different parts.
I don’t now, wether it is a problem by openstratmap or with my programm.
Can you help me?

We could try to help you in a better way if you give us more details about your issue:

What data or graphic do you want to display, and what is the exact source?

What is exactly version of Leafletjs, Drupal or any plugin used?

Please provide some screenshots.