This map was provided by a user.
The kml file is in a different directory to the Joomla installation.
Note also that "http:" call gets turned to "https:" automatically.
Now try his call to his file.
Had to take a space out after the opening "'"
This map was provided by a user.
The actual web site where it is in use is https://www.natuurschoon-nietap.nl/natuurschoon
Though I have some Dutch relations, I do not speak Dutch - but the website seems similar in may ways to Linnpark.org.uk
Interestingly, if one uses Google to Translate the web site: https://translate.google.com/?sl=auto&tl=en&op=websites it causes the TDOC Google Maps plugin [tdocgmap] to fail with this message:
Sorry! Something went wrong.
This page didn't load Google Maps correctly. See the JavaScript console for technical details.
We have a request that the initial map display view be in "Satellite" mode as opposed to "Terrain" mode which is the default. Once the map is displayed you do have the option to change the display mode, but ... it's on the "to do" list.