I found a solution. I don’t know exactly how it works, but it works for me now, after a lot of research,
I needed to change the name of Primary Asset Type to “ + “_C““ (like in this post Setup primary assets via blueprint for asset manager scan - #8 by Roman_Roba), but I also needed to change the “Asset Base Class“ to DataAsset instead of my primary data asset, I saw in some posts telling there were some kind of trouble with primary data assets in blueprints, I don’t understand why it worked even with all the documentation and tutorials told me to use the primary data asset name.
But just in case you are dealing with similar problems.