XIAO vanished from Arduino IDE Boards Manager

Suddenly, I can’t connect to my Seeeduino XIAO any more. I installed it maybe three years ago and it used to be listed in the Boards Manager but I can’t find it. Help!!

Solved! It must have vanished when “updated”
File > Preferences then paste: https://files.seeedstudio.com/arduino/package_seeeduino_boards_index.json into “Additional Board Manager URLs”

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