Antonio Valanzano

I have added the following "opentopomap.xml" file to the folder mapsources <custommapsource> <name>OpenTopoMap</name> <minzoom>0</minzoom> <maxzoom>17</maxzoom> <tiletype>png</tiletype> <tileupdate>None</tileupdate> <url>https://opentopomap.org{$z}/{$x}/{$y}.png</url> <backgroundcolor>0#FFFFFF</backgroundcolor> </custommapsource> but when I start MOBAC I receive an error saying that the file is malformed (see attachment). Does someone know how to solve this problem? Thanks in advance Antonio Val...