Help please, I want to make my card and install it on my server (I did everything with the help of the Map Editor), I now have an .xml file. How do I install it on my server?
What exactly do you mean your card? and if it’s a map file convert it to ymap and stream it to your server.
How to save a map in the “Map Editor” that it is then installed on the server?
No offence man, but I can’t understand your English. If you want a map editor xml file in fivem, drag it into open iv, extract the now ymap file, add it to a __resource.lua file and put the ymap into a stream folder.
Map Editor is no longer available for download so you are not gonna receive and support with it 
I just do not understand what I need to do with the file “map.xml”, that would install it on my server