I’m using a Swiss-German keyboard on macOS 10.13.6 with Vital 1.0.7 in Reaper. When asked to log in, there’s no keyboard input when pressing @, thus can’t enter an email address. Same when trying to rename a preset. There, I just noticed: Reaper gets the keystrokes (feed-thru), i.e. space bar starts playing in Reaper!
My workaround for entering an email address was to switch to US keyboard - no problems there!