Hi, I also have this problem in 5.5.0-5.5.1, for now for my workaround is to disable “Interchange” plugin to go back to old asset importer. But I think this will break new Mesh Paint function in 5.5, and also Fab plugin, but since I’m not using them currently so it’s okay for me.
according to this post this will likely fixed in 5.5.2