tacocat

I was having the same problem, resorted to uninstalling too. If you just want to play for now there was this link, which is getting the old launcher back. Not an answer to what you were asking, but if you lost BnS completely like I had and want to play and figure it out in time: https://support.bladeandsoul.com/hc/en-us/articles/360025211952?input_string=can+not+reinstall+game