Unfortunately i'm very busy with completely different stuff at the moment, so it may take me a while before i can work on the plugin again.
I haven't had the time yet to install Joomla 4 - i hope i don't have to change a bunch of things to get the plugin to work with Joomla 4. I'm not exactly a PHP expert, so any code change takes me ages...
If any of you has the time to give it a try on Joomla 4, i'm grateful for every help i can get!
I just tried by replacing the contents of the gpxtrackmap.php file with the code of the topic "(a) waypoints" and with a script similar to your example.
I have this error in return:
Thank you for your help