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@悪魔 the map you linked is a 0.7 map, so the ddnet server (and also trashmap) can't load it currently (that is being fixed rn iirc). also, the map file contains 3 textures which are invalid but they don't seem to be anything major.
I converted the map from 0.7 to 0.6 and deleted the unused textures, you should be able to use this map file normally