I've been playing on the Japanese server for just over a year, but I've been having this problem since July 2019 where I'm unable to fix my swords. Every time I try to pick someone the error code 100000 pops up and I have to return to the title screen. The web version is fine, but I cannot speed up the process, as the game crashes.
I've tried to re-login, reinstall the game, clearing the cache and even emailed the Japanese TKRB team. However, they said there is nothing they can do as the game is only supported in Japan. (I think my broken Japanese gave away the fact that I live outside Japan.)
I just want to know if anyone else has experienced a similar problem to mine, or is it an isolated event. I'm also wondering if it has anything with perhaps my IP address or something along those lines, as even starting a completely new game (both in the app and on the browser) has the exact same error.