A lot of mods have been made obsolete, as far as I know. Not sure how the launcher handles this and/or why some of them are working, but it might be related to that (although it shouldn’t be a problem if you downloaded them from an extern source or moved them from your old game folder).
Maybe double check if the mods you try to run got a line “obsolete=true” in their according modinfo.json file and delete that line if that’s the case.
Sadly, I have no idea what’s wrong with the tileset.