Sir Syddan
In the starting location, the dolmen of knowledge is incorrectly placed, making it impossible to visit the witch's bank at 69 2, the astrologer's tower at 100 45, and the graveyard at 36 123. Also, most obstacles can be bypassed, which looks like an oversight; for example, the area opened by the green tent with the staff of the underworld can be easily bypassed at 7 74, and a druid attacks you there for some reason. There might be other issues as well.
To be able to choose your hero, you need to go to map properties (the icon with a folder in a box, 5th from the end at the top), and in player properties, set the player and make sure they start in the city.
In short, before uploading the map, test it yourself, or have a friend play it, or gather a group of testers.
