the file is ynh-hotspot not hotspot

conf/systemd.service

@@ -5,8 +5,8 @@ After=network.target
 
 [Service]
 Type=oneshot
-ExecStart=/usr/local/bin/__APP__ start
-ExecStop=/usr/local/bin/__APP__ stop
+ExecStart=/usr/local/bin/ynh-hotspot start
+ExecStop=/usr/local/bin/ynh-hotspot stop
 RemainAfterExit=yes
 
 [Install]