Missing tileset asset

i used super tiled 2 unity, to import a map from tiledmap. So the problem is that i import the files (.tmx,.tsx and .png), all seems ok, but when i click into tmx it seems that .tsx is missing, but it isn’t.

Hi there, @Ramon_Torras. The message about a missing tileset means that it either hasn’t been imported into your Unity project, or, it failed to import for some reason. Can you find the tileset in your Unity project? And if so, when you select it is there an error present?

If there is an error can you post that message in full? Thanks.